Advanced The Vitamin C 23 Serum

Whether it supports the skin barrier — restoring lipids, reducing water loss, aiding barrier repair, or strengthening the skin’s protective function.

From Niacinamide, Squalane, Sodium Hyaluronate, Tocopherol

Whether it can help uneven tone, dark spots, melasma-like discoloration, or post-inflammatory hyperpigmentation — including brightening and tyrosinase-inhibiting ingredients.

From Ascorbic Acid, Glycyrrhiza Glabra (Licorice) Root Extract, 3-O-Ethyl Ascorbic Acid, Niacinamide

Whether the ingredient helps increase the skin’s water content — humectants that attract water, ingredients that reduce water loss, or ones that make skin feel less dry.

From Sodium Hyaluronate, Panthenol, Squalane, Arginine

Whether it can calm the skin — linked to less redness, irritation, discomfort, or visible reactivity.

From Niacinamide, Glycyrrhiza Glabra (Licorice) Root Extract, Panthenol, Allantoin

Whether it can improve smoothness and surface texture — roughness, flaking, clogged pores, or unevenness. Exfoliating acids, retinoids, and smoothing moisturizers may score here.

From Niacinamide, Ascorbic Acid, Panthenol, 3-O-Ethyl Ascorbic Acid

Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.

From Alcohol Denat., Sodium Chloride, Ascorbic Acid, Pentylene Glycol

Whether it can weaken or damage the skin barrier — harsh surfactants, strong exfoliants, high alcohol content, or overuse-prone actives.

From Alcohol Denat., Sodium Chloride

Whether it may sting or irritate around the eyes. Relevant for sunscreens, fragrances, acids, surfactants, and volatile ingredients.

From Alcohol Denat., Sodium Chloride

Risk of allergic contact dermatitis or immune-based reactions. Fragrance allergens, preservatives, botanicals, and some dyes may score here.

From Gardenia Florida Fruit Extract, Alcohol Denat., Glycyrrhiza Glabra (Licorice) Root Extract

Whether it has meaningful potential to be absorbed into the body at levels that may matter biologically. Most cosmetic ingredients score low unless there is known concern or high exposure.