No.5 Vitamin Concentrated Serum

Yes. This serum does not contain any ingredients commonly flagged as unsafe during pregnancy such as retinoids (retinol, tretinoin), salicylic acid (BHA), hydroquinone, or chemical sunscreen filters. The key actives — Niacinamide, Tranexamic Acid, Panthenol, and Vitamin C derivatives — are generally considered safe for use during pregnancy and breastfeeding. However, always consult your healthcare provider before introducing new skincare products during pregnancy.

Use with caution. The formula contains Bifida Ferment Lysate (a ferment ingredient), Butyrospermum Parkii (Shea) Butter, Caprylic/Capric Triglyceride, and Neopentyl Glycol Dicaprate — all of which are potential fungal acne triggers. However, these ingredients are present at relatively low concentrations, and multiple user reviews from fungal acne-prone individuals report no issues. Patch test on a small area first. If you are extremely sensitive to malassezia triggers, consider a strictly FA-safe alternative.

Yes, with some precautions. This serum is compatible with most actives. For retinol: apply this serum first, let it absorb, then apply retinol. They work well together — Niacinamide can even reduce retinol-related irritation. For Vitamin C (L-Ascorbic Acid): best to use at different times of day to avoid pH conflicts. For AHA/BHA: apply exfoliants first, wait a few minutes, then layer this serum on top. If you experience any irritation, alternate days rather than layering together.

This serum is formulated for all skin types — oily, dry, combination, sensitive, and acne-prone. It is particularly excellent for oily, combination, and sensitive skin types due to its oil-free, alcohol-free, lightweight formula. Dry skin types will benefit from the Panthenol and Hyaluronic Acid but should layer a richer moisturizer on top. The 0.00 irritation index testing makes it especially suitable for reactive and sensitive skin.

Most users notice an immediate glow and improved hydration within the first week. Skin texture improvement typically occurs within 2–3 weeks. Visible dark spot reduction and skin tone evening are clinically measured at 4 weeks (18.90% improvement in tone evenness). For deeper or older dark spots, expect 6–8 weeks of consistent twice-daily use for noticeable fading. Individual results vary based on skin type, severity of pigmentation, and consistency of application.

Apply this serum at Step 3 in your routine: after Cleanser and Toner, but before Moisturizer and Sunscreen. Use 3–5 drops on your entire face after toner has absorbed. Pat gently until absorbed (about 15 seconds), then follow with your moisturizer. In the morning, always finish with sunscreen SPF 30+. This serum can be used both morning and evening.

This serum has a very low comedogenic rating of 1 out of 5. It is oil-free, silicone-free, and does not contain heavy pore-clogging ingredients. While Shea Butter is present, it is at a low concentration and has a comedogenic rating of 0–2. The Niacinamide in the formula actually helps regulate sebum production and minimize pore appearance. The vast majority of user reviews, including those with acne-prone skin, report no breakouts or clogged pores from this product.

The Period After Opening (PAO) is 12 months. The dark glass dropper bottle helps protect the light-sensitive Vitamin C ingredients from oxidation. Store in a cool, dry place away from direct sunlight. If the serum changes color significantly (becomes dark yellow or brown) or develops an unusual odor before the 12-month mark, discontinue use. The 30ml bottle typically lasts 4–6 weeks with twice-daily use of 3–5 drops.