Soothing Aloe After Sun Gel

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

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 humectant that draws water into the skin. One of the best-studied, best-tolerated ingredients in personal care.

A widely used emulsifier and solubilizer that has been in cosmetics and pharmaceuticals for decades. The CIR has assessed it as safe with no known concerns at typical cosmetic concentrations. As with any surfactant, some people with very sensitive skin may experience mild irritation.

Carbomer is a synthetic polymer used purely to thicken and stabilize gels and lotions, with negligible skin penetration due to its large molecular size. Safety reviews have found low toxicity and minimal irritation potential even in leave-on use.

A pH buffer that neutralizes acidic ingredients to maintain a skin-compatible formulation pH. Decades of safety data and modern manufacturing practices support its use at cosmetic concentrations.

A plant-derived water or extract used mainly as a soothing humectant filler. Evidence for dramatic skin benefits beyond mild hydration and soothing is limited, but it is well tolerated by most people.

An organic UV filter with a genuinely mixed evidence picture: it is a documented contact and photo-contact allergen in a subset of users, and studies show it absorbs into the bloodstream at levels that prompted the FDA to request further safety data. The EU has lowered its permitted concentration as a precaution. It is not established as unsafe at approved levels, but people with sensitive skin may prefer to watch for reactions or choose a mineral filter.

A formaldehyde-releasing preservative used to extend shelf life. It is one of the more frequently reported contact-allergy triggers among preservatives, so people with sensitive or eczema-prone skin, or a known formaldehyde allergy, may want to patch test or avoid it.

A halogenated preservative used to prevent microbial growth in leave-on and rinse-off cosmetics. Published assessments consider it safe at permitted use levels, but it is a recognized contact allergen; people with known sensitizer profiles or a history of cosmetic dermatitis should patch-test products containing it.

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.