Eryfotona Actinica Ultralight Emulsion SPF 50

A mineral UV filter that sits on the skin surface and reflects and scatters UV light. It is one of the best-studied sunscreen actives and is generally considered non-irritating and safe for use, including on sensitive skin.

The base most products are built on. It carries the other ingredients and has no safety concern.

A lightweight emollient used in cosmetics and sunscreens to give a smooth texture. Inert and well tolerated.

A lightweight, volatile silicone that gives serums and primers their silky slip and quick-evaporating finish. Human safety data are reassuring; the EU restriction on this ingredient in rinse-off products is about environmental persistence in waterways, not skin safety.

A lightweight, silicone-like emollient derived from coconut/palm fatty alcohols, used to give lotions a smoother, less greasy feel. Listed in the EU CosIng database as a skin-conditioning agent with no restrictions.

A fast-evaporating solvent used to carry actives and give toners a light, "clean" feel; at the concentrations used in classic astringents it can be genuinely drying or irritating with repeated use, especially on dry or compromised skin, though it is not inherently toxic and is a normal, well-studied cosmetic ingredient.

A lightweight humectant and solvent similar in role to propylene glycol, used to carry actives and give lotions a lighter feel. CIR has reviewed it and considers it safe as used in cosmetics.

A synthetic polymer used to impart silky texture and film-forming properties in skincare. Nylon particles remain on the surface and do not penetrate or absorb systemically, with a long history of safe use in cosmetics.

A silicone emulsifier combining polyethylene glycol and dimethicone to help blend water and oil phases in serums and primers. Limited but consistent data support its safety in cosmetic formulations.

A silicone that gives a smooth, soft feel and helps hold water in the skin. Inert and well studied.

Ordinary salt, used in surfactant-based products like shampoos and body washes to adjust viscosity by interacting with the surfactant micelles. It has no meaningful toxicity concern at cosmetic use levels; the main practical downside is that too much can make a formula feel less mild.

A widely used preservative, safe at the legal limit of 1% or less. Often the "paraben-free" replacement.

A quaternized clay mineral used to thicken and suspend products. CIR found it safe as used, though the mineral base means trace amounts of inhalable silica particles exist if the powder form is aerosolized. It is well tolerated in leave-on and rinse-off cosmetics when formulated properly.

A silane used to improve texture and conditioning properties in leave-on cosmetics. It is hydrolyzed during formulation and creates silicone-like benefits; well tolerated at standard use levels.

A more stable, esterified form of vitamin E used as an antioxidant and skin-conditioning ingredient. It is a different substance from the vitamin E acetate implicated in vaping-related lung injury, which involved inhaling the oil, not applying it topically to skin.

A common emulsifier and texture-softener made from glycerin and stearic acid. CIR review of this class found no evidence of reproductive, carcinogenic, sensitizing, or phototoxic effects in the studies examined.

An undisclosed scent blend that can contain dozens of components. The single most common cause of cosmetic contact allergy, and the blend is not itemized, so you cannot see what is in it.

Bisabolol is a botanically derived (or synthetically nature-identical) compound used for its calming, anti-irritant reputation in sensitive-skin formulas. Safety reviews and long clinical use have found it well tolerated with a low rate of reported reactions.

A chelating agent that binds trace metal ions to keep formulas stable and preservatives working properly. It is not a functional skincare "active" and only a very small amount is used, with minimal skin penetration expected.

A glycerin derivative used as a skin conditioner and preservative booster, often paired with phenoxyethanol to allow lower total preservative levels. It has a low irritation and sensitization profile in safety reviews.

A soothing humectant that helps skin and hair look conditioned. Very well tolerated.

A lightweight polyethylene glycol that draws moisture into skin and helps dissolve other ingredients. Published safety reviews support its use; concerns about absorption through skin are overstated for leave-on formulations.

An antioxidant that helps protect a formula and condition skin. Well tolerated.

A phospholipid emulsifier from soy or sunflower that binds water and oil and helps other ingredients absorb. It is a natural component of skin membranes, well tolerated, and reviewed as safe as used; a soy-derived grade is not a meaningful concern for a soy food allergy because the protein is largely absent.

A fat-soluble vitamin C ester that provides antioxidant activity on skin. It is more stable than free ascorbic acid and is graded low concern in published assessments, with rare reports of sensitization at high concentrations.

The most well-studied form of topical vitamin C, used as an antioxidant and to support collagen signaling and brighten uneven tone. It is acidic and can sting or irritate sensitive skin, and it oxidizes readily once a bottle is opened, which can reduce its effectiveness rather than create a safety issue.

Used in tiny amounts to set a product to skin-friendly pH. No concern at those levels.