Marine Hyaluronics
An ultra-lightweight hydrating serum featuring marine-derived water reservoirs that attract and hold moisture like hyaluronic acid, but with a water-like texture that absorbs instantly. Perfect for oily and combination skin types seeking deep hydration without heaviness or stickiness.
✨ Texture & Feel
Marine-Derived Hydration
Contains sustainably sourced marine bacteria, Hawaiian red algae, Antarctic glycoproteins, and blue-green algae that attract and hold water like hyaluronic acid.
Ultra-Lightweight Formula
Water-like texture absorbs instantly without any stickiness, tackiness, or residue. Lighter than traditional hyaluronic acid serums.
Amino Acid Complex
11 barrier-supporting amino acids including Arginine, Glycine, and Proline help strengthen the skin barrier and support natural moisture retention.
No Conflicts
Can be used with any other skincare product including retinoids, vitamin C, AHAs, BHAs, and niacinamide without any known conflicts.
🛡️ Safety & Compatibility
Contains no retinoids, salicylic acid in significant amounts, hydroquinone, or chemical sunscreens. Safe for use during pregnancy and while nursing.
Contains Polysorbate 20 and fermented ingredients which may potentially feed malassezia. However, also contains salicylic acid which fights fungal growth.
Oil-free, lightweight formula with a comedogenic rating of 0-1. Unlikely to clog pores or cause breakouts.
Free from common irritants including fragrance, alcohol, essential oils, and harsh preservatives. Patch test recommended for very reactive skin.
🔬 Ingredient Breakdown
🌊 Pseudoalteromonas Ferment Extract Marine Bacteria Proven
A fermented extract from marine bacteria that provides powerful humectant properties. Creates a moisture reservoir on the skin to attract and hold water, similar to hyaluronic acid but with a lighter feel.
- Function: Humectant that draws water into the skin
- Benefit: Protects skin from redness and dryness
- Source: Sustainably sourced marine bacteria
🔴 Ahnfeltia Concinna Extract Hawaiian Red Algae Proven
A nutrient-rich extract from Hawaiian red algae that works as both a skin protectant and hydrator. Mildly stimulates circulation to help other hydrating ingredients penetrate deeper into the skin.
- Function: Skin protectant and circulation booster
- Benefit: Helps HA penetrate deeper into skin
- Source: Sustainably harvested Hawaiian red algae
💧 Glycerin 3.8-5.7% Gold Standard
One of the most effective humectants in skincare. A 2016 study found glycerin to be more effective than AHAs and hyaluronic acid as a humectant. Naturally found in skin, it helps maintain the moisture barrier.
- Function: Humectant and skin barrier support
- Benefit: Attracts moisture to deeper skin layers
- Research: Proven antimicrobial and antiviral properties
🧬 Amino Acid Complex 11 Types Proven
Contains 11 amino acids including Arginine, Glycine, Alanine, Serine, Valine, Isoleucine, Proline, Threonine, Histidine, Phenylalanine, and Aspartic Acid. These are the building blocks of skin proteins like collagen.
- Function: Natural moisturizing factors (NMFs)
- Benefit: Support skin barrier, wound healing, and hydration
- Note: Proline may help improve appearance of wrinkles
🧴 Salicylic Acid Trace Supporting
Present in very small amounts as a supporting ingredient. This BHA helps with gentle exfoliation, pore unclogging, and has anti-inflammatory properties. Not present in high enough concentration for significant exfoliation.
- Function: Mild exfoliant and anti-inflammatory
- Benefit: Helps maintain clear pores
- Note: May help counteract fungal growth
33 ingredients
Aqua (Water), Glycerin, Algae Extract, Pseudoalteromonas Exopolysaccharides, Pseudoalteromonas Ferment Extract, Ahnfeltia Concinna Extract, Arginine, Glycine, Alanine, Serine, Valine, Isoleucine, Proline, Threonine, Histidine, Phenylalanine, Aspartic Acid, PCA, Sodium PCA, Sodium Lactate, Salicylic Acid, Citric Acid, Propanediol, Dimethyl Isosorbide, Ethoxydiglycol, Polysorbate 20, Potassium Sorbate, Sodium Salicylate, Sodium Benzoate, Hexylene Glycol, 1,2-Hexanediol, Phenoxyethanol, Caprylyl Glycol
🔄 Where It Fits in Your Routine
Apply this water-based serum after cleansing and toning, but before heavier serums, oils, and creams. Can be used AM and PM.
📝 How to Use
Cleanse Your Face
Start with clean, freshly washed skin. Pat dry or leave slightly damp for better absorption.
Apply 3-5 Drops
Dispense drops directly onto face and neck. Due to its water-like consistency, applying drop-by-drop works best.
Pat Gently
Gently pat the serum into your skin. It absorbs almost instantly, so work quickly to spread it evenly.
Follow with Moisturizer
Seal in the hydration with a moisturizer or facial oil. This serum alone is not enough for complete moisture retention.
👤 Who Is It For?
✅ Perfect for you if:
- You have oily or combination skin
- You find traditional HA serums too sticky or heavy
- You want lightweight hydration for summer
- You use tretinoin or retinoids and need hydration support
- You layer multiple products and need a fast-absorbing base
- You want an affordable hyaluronic acid alternative
- You prefer fragrance-free, minimal formulas
❌ Consider alternatives if:
- You have very dry skin needing intense moisture
- You prefer a thicker, more viscous serum texture
- You have active fungal acne (malassezia)
- You want a standalone moisturizing product
- You live in an extremely dry climate with low humidity
- You prefer multi-weight hyaluronic acid formulas
🎯 Skin Type Compatibility
Perfect match! Ultra-lightweight texture absorbs instantly without adding shine or greasiness. Won't clog pores.
Ideal for balancing hydration across different zones without overwhelming oily areas or underwhelming dry patches.
May feel too light on its own. Best layered with richer moisturizers or consider the HA 2% + B5 for more hydration.
Fragrance-free and gentle formula. Patch test recommended for very reactive skin. Most users report no irritation.
Non-comedogenic and oil-free. Contains trace salicylic acid. Use caution if you have fungal acne specifically.
Provides plumping hydration and amino acids that support skin structure. Layer with anti-aging treatments for best results.
📈 Results Timeline
Instant Hydration Boost
Skin feels refreshed, soft, and comfortable. The water-like texture absorbs within seconds, leaving no residue.
95% noticed immediate softnessImproved Skin Texture
Consistent use leads to smoother, more supple skin. Dehydration lines begin to diminish and skin feels plumper.
64% reported improved skinEnhanced Moisture Retention
Skin barrier strengthens with continued amino acid support. Better moisture retention throughout the day, less tightness and dryness.
62% will repurchaseLong-Term Hydration Balance
Skin maintains optimal hydration levels. Works synergistically with other products in your routine for cumulative benefits.
65% love this product⭐ Ratings by Platform
⚖️ Pros & Cons
✅ Praised
- Incredibly lightweight, absorbs instantly
- No stickiness or tackiness like regular HA
- Excellent value for money (under $10)
- No conflicts with other skincare products
- Perfect for oily and combination skin
- Sustainably sourced marine ingredients
- Vegan and cruelty-free
- Great under makeup
❌ Criticized
- Too light/watery for some users
- May not be enough for very dry skin
- Small bottle size (30ml)
- Some report an unusual scent
- Dropper can be difficult to control
- Not fungal acne safe for everyone
- Needs to be sealed with moisturizer
💰 Budget-Friendly Alternatives (Dupes)
Thicker, more viscous formula with multi-weight hyaluronic acid and vitamin B5. Better for dry skin, but stickier texture. Same price point.
Similar lightweight, watery texture with hydrating properties. Contains different active ingredients but achieves comparable results at a lower price.
Very similar lightweight texture. Korean beauty formula with different marine extracts. More expensive but highly rated by K-beauty enthusiasts.
Japanese cult favorite with 5 types of hyaluronic acid. Slightly thicker texture but still lightweight. Better for those who want more traditional HA benefits.
🔄 Comparison with Competitors
The Ordinary Marine Hyaluronics
$6.80The Ordinary HA 2% + B5
$8.90Hada Labo Premium Lotion
$13.00NIOD Multi-Molecular HA Complex
$48.00📦 Storage & Shelf Life
12 months after opening
Store in a cool, dry place away from direct sunlight. No refrigeration required.
Glass dropper bottle with pipette applicator
Yes, 30ml is under the 100ml liquid limit for carry-on luggage
❓ Frequently Asked Questions
Yes, Marine Hyaluronics is considered safe for use during pregnancy and breastfeeding. It contains no retinoids, high-concentration salicylic acid, hydroquinone, or chemical sunscreens. The trace amount of salicylic acid present is not at a concerning level. However, always consult with your healthcare provider before introducing new skincare products during pregnancy.
Use with caution. Marine Hyaluronics contains Polysorbate 20 and Pseudoalteromonas Ferment Extract, which are flagged by some fungal acne databases as potential triggers. However, it also contains salicylic acid which can help fight fungal growth. Results vary by individual - some with fungal acne use it successfully while others experience flare-ups. If you have active fungal acne, consider patch testing or choosing a verified fungal-acne-safe alternative.
Yes! One of the best features of Marine Hyaluronics is that it has no known conflicts with other skincare ingredients. You can safely use it with retinol/retinoids, vitamin C, AHAs (glycolic, lactic acid), BHAs (salicylic acid), niacinamide, and peptides. Apply Marine Hyaluronics first as a hydrating base, then layer your other treatments on top.
Marine Hyaluronics is excellent for oily, combination, and dehydrated skin types. Its ultra-lightweight, water-like texture absorbs instantly without adding shine or stickiness. It's also great for those who find traditional hyaluronic acid serums too heavy or tacky. Those with very dry skin may find it too light on its own and should consider the HA 2% + B5 instead, or layer this under a richer moisturizer.
You'll feel immediate hydration and softness after the first application. Visible improvements in skin texture and plumpness typically appear within 1-2 weeks of consistent twice-daily use. For long-term benefits like improved moisture retention and skin barrier support, expect to see cumulative results over 4-8 weeks of regular use.
Apply Marine Hyaluronics after cleansing and toning, but before heavier serums, oils, suspensions, or creams. As a water-based product, it should be one of the first layers in your routine. The general rule is to apply products from thinnest to thickest consistency. Use it both morning and evening for best results, and always follow with a moisturizer to seal in the hydration.
No, Marine Hyaluronics has a very low comedogenic rating of 0-1 out of 5. It's oil-free, silicone-free, and contains no known pore-clogging ingredients. The lightweight, water-based formula is specifically designed to absorb quickly without leaving any residue that could contribute to clogged pores or breakouts.
Marine Hyaluronics has a Period After Opening (PAO) of 12 months. Once opened, use within one year for optimal effectiveness and safety. Store in a cool, dry place away from direct sunlight. The 30ml bottle typically lasts 2-3 months with twice-daily use of 3-5 drops per application.
Verdict: The Ordinary Marine Hyaluronics is an excellent budget-friendly hydrating serum, particularly for those with oily or combination skin who find traditional hyaluronic acid serums too sticky or heavy. Its unique marine-derived ingredients and amino acid complex provide effective hydration with an impressively lightweight, water-like texture that absorbs instantly. At under $10, it offers exceptional value. However, those with very dry skin may find it insufficient as a standalone hydrator, and those with fungal acne should proceed with caution. Best used as part of a layered routine, sealed with a moisturizer for optimal results.
Original: $920.00
-70%$920.00
$276.00Marine Hyaluronics
An ultra-lightweight hydrating serum featuring marine-derived water reservoirs that attract and hold moisture like hyaluronic acid, but with a water-like texture that absorbs instantly. Perfect for oily and combination skin types seeking deep hydration without heaviness or stickiness.
✨ Texture & Feel
Marine-Derived Hydration
Contains sustainably sourced marine bacteria, Hawaiian red algae, Antarctic glycoproteins, and blue-green algae that attract and hold water like hyaluronic acid.
Ultra-Lightweight Formula
Water-like texture absorbs instantly without any stickiness, tackiness, or residue. Lighter than traditional hyaluronic acid serums.
Amino Acid Complex
11 barrier-supporting amino acids including Arginine, Glycine, and Proline help strengthen the skin barrier and support natural moisture retention.
No Conflicts
Can be used with any other skincare product including retinoids, vitamin C, AHAs, BHAs, and niacinamide without any known conflicts.
🛡️ Safety & Compatibility
Contains no retinoids, salicylic acid in significant amounts, hydroquinone, or chemical sunscreens. Safe for use during pregnancy and while nursing.
Contains Polysorbate 20 and fermented ingredients which may potentially feed malassezia. However, also contains salicylic acid which fights fungal growth.
Oil-free, lightweight formula with a comedogenic rating of 0-1. Unlikely to clog pores or cause breakouts.
Free from common irritants including fragrance, alcohol, essential oils, and harsh preservatives. Patch test recommended for very reactive skin.
🔬 Ingredient Breakdown
🌊 Pseudoalteromonas Ferment Extract Marine Bacteria Proven
A fermented extract from marine bacteria that provides powerful humectant properties. Creates a moisture reservoir on the skin to attract and hold water, similar to hyaluronic acid but with a lighter feel.
- Function: Humectant that draws water into the skin
- Benefit: Protects skin from redness and dryness
- Source: Sustainably sourced marine bacteria
🔴 Ahnfeltia Concinna Extract Hawaiian Red Algae Proven
A nutrient-rich extract from Hawaiian red algae that works as both a skin protectant and hydrator. Mildly stimulates circulation to help other hydrating ingredients penetrate deeper into the skin.
- Function: Skin protectant and circulation booster
- Benefit: Helps HA penetrate deeper into skin
- Source: Sustainably harvested Hawaiian red algae
💧 Glycerin 3.8-5.7% Gold Standard
One of the most effective humectants in skincare. A 2016 study found glycerin to be more effective than AHAs and hyaluronic acid as a humectant. Naturally found in skin, it helps maintain the moisture barrier.
- Function: Humectant and skin barrier support
- Benefit: Attracts moisture to deeper skin layers
- Research: Proven antimicrobial and antiviral properties
🧬 Amino Acid Complex 11 Types Proven
Contains 11 amino acids including Arginine, Glycine, Alanine, Serine, Valine, Isoleucine, Proline, Threonine, Histidine, Phenylalanine, and Aspartic Acid. These are the building blocks of skin proteins like collagen.
- Function: Natural moisturizing factors (NMFs)
- Benefit: Support skin barrier, wound healing, and hydration
- Note: Proline may help improve appearance of wrinkles
🧴 Salicylic Acid Trace Supporting
Present in very small amounts as a supporting ingredient. This BHA helps with gentle exfoliation, pore unclogging, and has anti-inflammatory properties. Not present in high enough concentration for significant exfoliation.
- Function: Mild exfoliant and anti-inflammatory
- Benefit: Helps maintain clear pores
- Note: May help counteract fungal growth
33 ingredients
Aqua (Water), Glycerin, Algae Extract, Pseudoalteromonas Exopolysaccharides, Pseudoalteromonas Ferment Extract, Ahnfeltia Concinna Extract, Arginine, Glycine, Alanine, Serine, Valine, Isoleucine, Proline, Threonine, Histidine, Phenylalanine, Aspartic Acid, PCA, Sodium PCA, Sodium Lactate, Salicylic Acid, Citric Acid, Propanediol, Dimethyl Isosorbide, Ethoxydiglycol, Polysorbate 20, Potassium Sorbate, Sodium Salicylate, Sodium Benzoate, Hexylene Glycol, 1,2-Hexanediol, Phenoxyethanol, Caprylyl Glycol
🔄 Where It Fits in Your Routine
Apply this water-based serum after cleansing and toning, but before heavier serums, oils, and creams. Can be used AM and PM.
📝 How to Use
Cleanse Your Face
Start with clean, freshly washed skin. Pat dry or leave slightly damp for better absorption.
Apply 3-5 Drops
Dispense drops directly onto face and neck. Due to its water-like consistency, applying drop-by-drop works best.
Pat Gently
Gently pat the serum into your skin. It absorbs almost instantly, so work quickly to spread it evenly.
Follow with Moisturizer
Seal in the hydration with a moisturizer or facial oil. This serum alone is not enough for complete moisture retention.
👤 Who Is It For?
✅ Perfect for you if:
- You have oily or combination skin
- You find traditional HA serums too sticky or heavy
- You want lightweight hydration for summer
- You use tretinoin or retinoids and need hydration support
- You layer multiple products and need a fast-absorbing base
- You want an affordable hyaluronic acid alternative
- You prefer fragrance-free, minimal formulas
❌ Consider alternatives if:
- You have very dry skin needing intense moisture
- You prefer a thicker, more viscous serum texture
- You have active fungal acne (malassezia)
- You want a standalone moisturizing product
- You live in an extremely dry climate with low humidity
- You prefer multi-weight hyaluronic acid formulas
🎯 Skin Type Compatibility
Perfect match! Ultra-lightweight texture absorbs instantly without adding shine or greasiness. Won't clog pores.
Ideal for balancing hydration across different zones without overwhelming oily areas or underwhelming dry patches.
May feel too light on its own. Best layered with richer moisturizers or consider the HA 2% + B5 for more hydration.
Fragrance-free and gentle formula. Patch test recommended for very reactive skin. Most users report no irritation.
Non-comedogenic and oil-free. Contains trace salicylic acid. Use caution if you have fungal acne specifically.
Provides plumping hydration and amino acids that support skin structure. Layer with anti-aging treatments for best results.
📈 Results Timeline
Instant Hydration Boost
Skin feels refreshed, soft, and comfortable. The water-like texture absorbs within seconds, leaving no residue.
95% noticed immediate softnessImproved Skin Texture
Consistent use leads to smoother, more supple skin. Dehydration lines begin to diminish and skin feels plumper.
64% reported improved skinEnhanced Moisture Retention
Skin barrier strengthens with continued amino acid support. Better moisture retention throughout the day, less tightness and dryness.
62% will repurchaseLong-Term Hydration Balance
Skin maintains optimal hydration levels. Works synergistically with other products in your routine for cumulative benefits.
65% love this product⭐ Ratings by Platform
⚖️ Pros & Cons
✅ Praised
- Incredibly lightweight, absorbs instantly
- No stickiness or tackiness like regular HA
- Excellent value for money (under $10)
- No conflicts with other skincare products
- Perfect for oily and combination skin
- Sustainably sourced marine ingredients
- Vegan and cruelty-free
- Great under makeup
❌ Criticized
- Too light/watery for some users
- May not be enough for very dry skin
- Small bottle size (30ml)
- Some report an unusual scent
- Dropper can be difficult to control
- Not fungal acne safe for everyone
- Needs to be sealed with moisturizer
💰 Budget-Friendly Alternatives (Dupes)
Thicker, more viscous formula with multi-weight hyaluronic acid and vitamin B5. Better for dry skin, but stickier texture. Same price point.
Similar lightweight, watery texture with hydrating properties. Contains different active ingredients but achieves comparable results at a lower price.
Very similar lightweight texture. Korean beauty formula with different marine extracts. More expensive but highly rated by K-beauty enthusiasts.
Japanese cult favorite with 5 types of hyaluronic acid. Slightly thicker texture but still lightweight. Better for those who want more traditional HA benefits.
🔄 Comparison with Competitors
The Ordinary Marine Hyaluronics
$6.80The Ordinary HA 2% + B5
$8.90Hada Labo Premium Lotion
$13.00NIOD Multi-Molecular HA Complex
$48.00📦 Storage & Shelf Life
12 months after opening
Store in a cool, dry place away from direct sunlight. No refrigeration required.
Glass dropper bottle with pipette applicator
Yes, 30ml is under the 100ml liquid limit for carry-on luggage
❓ Frequently Asked Questions
Yes, Marine Hyaluronics is considered safe for use during pregnancy and breastfeeding. It contains no retinoids, high-concentration salicylic acid, hydroquinone, or chemical sunscreens. The trace amount of salicylic acid present is not at a concerning level. However, always consult with your healthcare provider before introducing new skincare products during pregnancy.
Use with caution. Marine Hyaluronics contains Polysorbate 20 and Pseudoalteromonas Ferment Extract, which are flagged by some fungal acne databases as potential triggers. However, it also contains salicylic acid which can help fight fungal growth. Results vary by individual - some with fungal acne use it successfully while others experience flare-ups. If you have active fungal acne, consider patch testing or choosing a verified fungal-acne-safe alternative.
Yes! One of the best features of Marine Hyaluronics is that it has no known conflicts with other skincare ingredients. You can safely use it with retinol/retinoids, vitamin C, AHAs (glycolic, lactic acid), BHAs (salicylic acid), niacinamide, and peptides. Apply Marine Hyaluronics first as a hydrating base, then layer your other treatments on top.
Marine Hyaluronics is excellent for oily, combination, and dehydrated skin types. Its ultra-lightweight, water-like texture absorbs instantly without adding shine or stickiness. It's also great for those who find traditional hyaluronic acid serums too heavy or tacky. Those with very dry skin may find it too light on its own and should consider the HA 2% + B5 instead, or layer this under a richer moisturizer.
You'll feel immediate hydration and softness after the first application. Visible improvements in skin texture and plumpness typically appear within 1-2 weeks of consistent twice-daily use. For long-term benefits like improved moisture retention and skin barrier support, expect to see cumulative results over 4-8 weeks of regular use.
Apply Marine Hyaluronics after cleansing and toning, but before heavier serums, oils, suspensions, or creams. As a water-based product, it should be one of the first layers in your routine. The general rule is to apply products from thinnest to thickest consistency. Use it both morning and evening for best results, and always follow with a moisturizer to seal in the hydration.
No, Marine Hyaluronics has a very low comedogenic rating of 0-1 out of 5. It's oil-free, silicone-free, and contains no known pore-clogging ingredients. The lightweight, water-based formula is specifically designed to absorb quickly without leaving any residue that could contribute to clogged pores or breakouts.
Marine Hyaluronics has a Period After Opening (PAO) of 12 months. Once opened, use within one year for optimal effectiveness and safety. Store in a cool, dry place away from direct sunlight. The 30ml bottle typically lasts 2-3 months with twice-daily use of 3-5 drops per application.
Verdict: The Ordinary Marine Hyaluronics is an excellent budget-friendly hydrating serum, particularly for those with oily or combination skin who find traditional hyaluronic acid serums too sticky or heavy. Its unique marine-derived ingredients and amino acid complex provide effective hydration with an impressively lightweight, water-like texture that absorbs instantly. At under $10, it offers exceptional value. However, those with very dry skin may find it insufficient as a standalone hydrator, and those with fungal acne should proceed with caution. Best used as part of a layered routine, sealed with a moisturizer for optimal results.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
An ultra-lightweight hydrating serum featuring marine-derived water reservoirs that attract and hold moisture like hyaluronic acid, but with a water-like texture that absorbs instantly. Perfect for oily and combination skin types seeking deep hydration without heaviness or stickiness.
✨ Texture & Feel
Marine-Derived Hydration
Contains sustainably sourced marine bacteria, Hawaiian red algae, Antarctic glycoproteins, and blue-green algae that attract and hold water like hyaluronic acid.
Ultra-Lightweight Formula
Water-like texture absorbs instantly without any stickiness, tackiness, or residue. Lighter than traditional hyaluronic acid serums.
Amino Acid Complex
11 barrier-supporting amino acids including Arginine, Glycine, and Proline help strengthen the skin barrier and support natural moisture retention.
No Conflicts
Can be used with any other skincare product including retinoids, vitamin C, AHAs, BHAs, and niacinamide without any known conflicts.
🛡️ Safety & Compatibility
Contains no retinoids, salicylic acid in significant amounts, hydroquinone, or chemical sunscreens. Safe for use during pregnancy and while nursing.
Contains Polysorbate 20 and fermented ingredients which may potentially feed malassezia. However, also contains salicylic acid which fights fungal growth.
Oil-free, lightweight formula with a comedogenic rating of 0-1. Unlikely to clog pores or cause breakouts.
Free from common irritants including fragrance, alcohol, essential oils, and harsh preservatives. Patch test recommended for very reactive skin.
🔬 Ingredient Breakdown
🌊 Pseudoalteromonas Ferment Extract Marine Bacteria Proven
A fermented extract from marine bacteria that provides powerful humectant properties. Creates a moisture reservoir on the skin to attract and hold water, similar to hyaluronic acid but with a lighter feel.
- Function: Humectant that draws water into the skin
- Benefit: Protects skin from redness and dryness
- Source: Sustainably sourced marine bacteria
🔴 Ahnfeltia Concinna Extract Hawaiian Red Algae Proven
A nutrient-rich extract from Hawaiian red algae that works as both a skin protectant and hydrator. Mildly stimulates circulation to help other hydrating ingredients penetrate deeper into the skin.
- Function: Skin protectant and circulation booster
- Benefit: Helps HA penetrate deeper into skin
- Source: Sustainably harvested Hawaiian red algae
💧 Glycerin 3.8-5.7% Gold Standard
One of the most effective humectants in skincare. A 2016 study found glycerin to be more effective than AHAs and hyaluronic acid as a humectant. Naturally found in skin, it helps maintain the moisture barrier.
- Function: Humectant and skin barrier support
- Benefit: Attracts moisture to deeper skin layers
- Research: Proven antimicrobial and antiviral properties
🧬 Amino Acid Complex 11 Types Proven
Contains 11 amino acids including Arginine, Glycine, Alanine, Serine, Valine, Isoleucine, Proline, Threonine, Histidine, Phenylalanine, and Aspartic Acid. These are the building blocks of skin proteins like collagen.
- Function: Natural moisturizing factors (NMFs)
- Benefit: Support skin barrier, wound healing, and hydration
- Note: Proline may help improve appearance of wrinkles
🧴 Salicylic Acid Trace Supporting
Present in very small amounts as a supporting ingredient. This BHA helps with gentle exfoliation, pore unclogging, and has anti-inflammatory properties. Not present in high enough concentration for significant exfoliation.
- Function: Mild exfoliant and anti-inflammatory
- Benefit: Helps maintain clear pores
- Note: May help counteract fungal growth
33 ingredients
Aqua (Water), Glycerin, Algae Extract, Pseudoalteromonas Exopolysaccharides, Pseudoalteromonas Ferment Extract, Ahnfeltia Concinna Extract, Arginine, Glycine, Alanine, Serine, Valine, Isoleucine, Proline, Threonine, Histidine, Phenylalanine, Aspartic Acid, PCA, Sodium PCA, Sodium Lactate, Salicylic Acid, Citric Acid, Propanediol, Dimethyl Isosorbide, Ethoxydiglycol, Polysorbate 20, Potassium Sorbate, Sodium Salicylate, Sodium Benzoate, Hexylene Glycol, 1,2-Hexanediol, Phenoxyethanol, Caprylyl Glycol
🔄 Where It Fits in Your Routine
Apply this water-based serum after cleansing and toning, but before heavier serums, oils, and creams. Can be used AM and PM.
📝 How to Use
Cleanse Your Face
Start with clean, freshly washed skin. Pat dry or leave slightly damp for better absorption.
Apply 3-5 Drops
Dispense drops directly onto face and neck. Due to its water-like consistency, applying drop-by-drop works best.
Pat Gently
Gently pat the serum into your skin. It absorbs almost instantly, so work quickly to spread it evenly.
Follow with Moisturizer
Seal in the hydration with a moisturizer or facial oil. This serum alone is not enough for complete moisture retention.
👤 Who Is It For?
✅ Perfect for you if:
- You have oily or combination skin
- You find traditional HA serums too sticky or heavy
- You want lightweight hydration for summer
- You use tretinoin or retinoids and need hydration support
- You layer multiple products and need a fast-absorbing base
- You want an affordable hyaluronic acid alternative
- You prefer fragrance-free, minimal formulas
❌ Consider alternatives if:
- You have very dry skin needing intense moisture
- You prefer a thicker, more viscous serum texture
- You have active fungal acne (malassezia)
- You want a standalone moisturizing product
- You live in an extremely dry climate with low humidity
- You prefer multi-weight hyaluronic acid formulas
🎯 Skin Type Compatibility
Perfect match! Ultra-lightweight texture absorbs instantly without adding shine or greasiness. Won't clog pores.
Ideal for balancing hydration across different zones without overwhelming oily areas or underwhelming dry patches.
May feel too light on its own. Best layered with richer moisturizers or consider the HA 2% + B5 for more hydration.
Fragrance-free and gentle formula. Patch test recommended for very reactive skin. Most users report no irritation.
Non-comedogenic and oil-free. Contains trace salicylic acid. Use caution if you have fungal acne specifically.
Provides plumping hydration and amino acids that support skin structure. Layer with anti-aging treatments for best results.
📈 Results Timeline
Instant Hydration Boost
Skin feels refreshed, soft, and comfortable. The water-like texture absorbs within seconds, leaving no residue.
95% noticed immediate softnessImproved Skin Texture
Consistent use leads to smoother, more supple skin. Dehydration lines begin to diminish and skin feels plumper.
64% reported improved skinEnhanced Moisture Retention
Skin barrier strengthens with continued amino acid support. Better moisture retention throughout the day, less tightness and dryness.
62% will repurchaseLong-Term Hydration Balance
Skin maintains optimal hydration levels. Works synergistically with other products in your routine for cumulative benefits.
65% love this product⭐ Ratings by Platform
⚖️ Pros & Cons
✅ Praised
- Incredibly lightweight, absorbs instantly
- No stickiness or tackiness like regular HA
- Excellent value for money (under $10)
- No conflicts with other skincare products
- Perfect for oily and combination skin
- Sustainably sourced marine ingredients
- Vegan and cruelty-free
- Great under makeup
❌ Criticized
- Too light/watery for some users
- May not be enough for very dry skin
- Small bottle size (30ml)
- Some report an unusual scent
- Dropper can be difficult to control
- Not fungal acne safe for everyone
- Needs to be sealed with moisturizer
💰 Budget-Friendly Alternatives (Dupes)
Thicker, more viscous formula with multi-weight hyaluronic acid and vitamin B5. Better for dry skin, but stickier texture. Same price point.
Similar lightweight, watery texture with hydrating properties. Contains different active ingredients but achieves comparable results at a lower price.
Very similar lightweight texture. Korean beauty formula with different marine extracts. More expensive but highly rated by K-beauty enthusiasts.
Japanese cult favorite with 5 types of hyaluronic acid. Slightly thicker texture but still lightweight. Better for those who want more traditional HA benefits.
🔄 Comparison with Competitors
The Ordinary Marine Hyaluronics
$6.80The Ordinary HA 2% + B5
$8.90Hada Labo Premium Lotion
$13.00NIOD Multi-Molecular HA Complex
$48.00📦 Storage & Shelf Life
12 months after opening
Store in a cool, dry place away from direct sunlight. No refrigeration required.
Glass dropper bottle with pipette applicator
Yes, 30ml is under the 100ml liquid limit for carry-on luggage
❓ Frequently Asked Questions
Yes, Marine Hyaluronics is considered safe for use during pregnancy and breastfeeding. It contains no retinoids, high-concentration salicylic acid, hydroquinone, or chemical sunscreens. The trace amount of salicylic acid present is not at a concerning level. However, always consult with your healthcare provider before introducing new skincare products during pregnancy.
Use with caution. Marine Hyaluronics contains Polysorbate 20 and Pseudoalteromonas Ferment Extract, which are flagged by some fungal acne databases as potential triggers. However, it also contains salicylic acid which can help fight fungal growth. Results vary by individual - some with fungal acne use it successfully while others experience flare-ups. If you have active fungal acne, consider patch testing or choosing a verified fungal-acne-safe alternative.
Yes! One of the best features of Marine Hyaluronics is that it has no known conflicts with other skincare ingredients. You can safely use it with retinol/retinoids, vitamin C, AHAs (glycolic, lactic acid), BHAs (salicylic acid), niacinamide, and peptides. Apply Marine Hyaluronics first as a hydrating base, then layer your other treatments on top.
Marine Hyaluronics is excellent for oily, combination, and dehydrated skin types. Its ultra-lightweight, water-like texture absorbs instantly without adding shine or stickiness. It's also great for those who find traditional hyaluronic acid serums too heavy or tacky. Those with very dry skin may find it too light on its own and should consider the HA 2% + B5 instead, or layer this under a richer moisturizer.
You'll feel immediate hydration and softness after the first application. Visible improvements in skin texture and plumpness typically appear within 1-2 weeks of consistent twice-daily use. For long-term benefits like improved moisture retention and skin barrier support, expect to see cumulative results over 4-8 weeks of regular use.
Apply Marine Hyaluronics after cleansing and toning, but before heavier serums, oils, suspensions, or creams. As a water-based product, it should be one of the first layers in your routine. The general rule is to apply products from thinnest to thickest consistency. Use it both morning and evening for best results, and always follow with a moisturizer to seal in the hydration.
No, Marine Hyaluronics has a very low comedogenic rating of 0-1 out of 5. It's oil-free, silicone-free, and contains no known pore-clogging ingredients. The lightweight, water-based formula is specifically designed to absorb quickly without leaving any residue that could contribute to clogged pores or breakouts.
Marine Hyaluronics has a Period After Opening (PAO) of 12 months. Once opened, use within one year for optimal effectiveness and safety. Store in a cool, dry place away from direct sunlight. The 30ml bottle typically lasts 2-3 months with twice-daily use of 3-5 drops per application.
Verdict: The Ordinary Marine Hyaluronics is an excellent budget-friendly hydrating serum, particularly for those with oily or combination skin who find traditional hyaluronic acid serums too sticky or heavy. Its unique marine-derived ingredients and amino acid complex provide effective hydration with an impressively lightweight, water-like texture that absorbs instantly. At under $10, it offers exceptional value. However, those with very dry skin may find it insufficient as a standalone hydrator, and those with fungal acne should proceed with caution. Best used as part of a layered routine, sealed with a moisturizer for optimal results.
