Photosensitivity i1.5 / 4
Whether it can make skin more sensitive to sunlight, raising the risk of sunburn or UV-related irritation. Relevant for some exfoliating acids, retinoids, and certain plant-derived ingredients.
Irritation i0.8 / 4
Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.
Sensitization i0.5 / 4
Risk of allergic contact dermatitis or immune-based reactions. Fragrance allergens, preservatives, botanicals, and some dyes may score here.