Kombucha Microbiome Luminosity Serum

Calendula extract is a traditional soothing botanical used in balms and after-sun formulas with a generally reassuring safety history. Like chamomile, it is part of the Asteraceae family, so cross-reactive contact allergy is possible for people already sensitive to ragweed or related plants.

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

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

Green tea extract is a well-studied topical antioxidant with a long history of use in serums and moisturizers, generally well tolerated at cosmetic concentrations. Panel safety reviews of Camellia sinensis-derived ingredients have not identified meaningful topical hazard.

A fragrant oil extracted from geranium flowers, used for scent and antioxidant benefits. It is a named fragrance allergen in the EU and can cause allergic contact dermatitis in sensitized individuals, particularly in leave-on formulations.

A small glycol used as a solvent and to boost the absorption of actives, and to help preservatives work at lower levels. It is well tolerated and graded low concern in published assessments.

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.

Xanthan gum is a microbial-fermentation-derived polysaccharide used to thicken and stabilize textures, similarly common in food. Cosmetic panel review of this and related microbial gums found them safe as used, with no meaningful irritation signal at typical concentrations.

A widely used, gentle preservative also common in food. It is generally well tolerated, though it can occasionally cause mild, transient irritation in people with already-compromised or very reactive skin.

The sodium salt of benzoic acid, used as a preservative in both foods and cosmetics. Decades of safety review support its use at typical cosmetic concentrations, with mild irritation the main reported issue in sensitive skin.

A common preservative and fragrance/solvent ingredient found naturally in many essential oils. It is well tolerated by most people at the levels used in cosmetics, but it is one of the 26 EU-designated fragrance allergens and can trigger reactions in people with an existing sensitivity.

Dehydroacetic acid is a preservative regulated under the EU preservative annex with a set maximum concentration. Sensitization appears to be rare, though occasional contact dermatitis case reports exist, so people with reactive skin may want to patch test.

A glycol used very widely in Korean and Western skincare as a lightweight humectant, solvent, and gentle preservative-booster, often in place of traditional preservatives. It has a low reported irritation rate at use levels and is graded low concern in published assessments.

Caprylyl glycol is a plant-derived humectant that also has mild antimicrobial properties, so it is commonly paired with other preservatives to allow lower overall preservative levels. Available data do not point to meaningful irritation or sensitization concerns at typical use levels.

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

A sulfur-containing antioxidant that functions both inside and outside cells, studied for anti-aging effects in cosmetics. Published safety assessments support low irritation at typical cosmetic concentrations, though some users may experience mild irritation or sensitivity at higher doses or when combined with other active ingredients.