Brightening Serum Arbutin 2% + Hyaluronic Acid

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

Arbutin is a plant-derived brightening ingredient that is chemically related to hydroquinone and can release small amounts of it in formulation. EU regulators have set new maximum use levels for arbutin and alpha-arbutin in leave-on products because of this hydroquinone-release concern, so products sold there must stay within those caps.

A fragrance component with a mild rose and honey scent, widely used in cosmetics and personal care products. Most people tolerate it without issue, though patch-test studies indicate a minority of individuals with fragrance sensitivities may react to it.

A cellulose derivative used to thicken and stabilize formulas. It dissolves fully in water and does not separate or settle over time. It is well tolerated and widely used in gels, lotions, and serums.

A small humectant and solvent molecule that helps other ingredients dissolve and helps skin hold water. It is one of the most studied cosmetic ingredients and is considered safe at the concentrations used in personal care products.

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.

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.

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

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

The sodium salt of lactic acid and a key component of the skin barrier and natural moisturizing factor that attracts water to the skin. It is well established as a safe and effective humectant with no known hazards at cosmetic concentrations.

An essential oil from grapefruit peel rich in limonene and other furocoumarins. It is a fragrance allergen that carries phototoxicity risk, particularly in sun-exposed areas; some formulations concentrate enough to cause phototoxic reactions in sensitive individuals.

Sodium PCA is a natural component of skin's own moisturizing factor and is used in cosmetics as a humectant to help skin hold onto water. It has an extensive history of safe use with no meaningful irritation or sensitization signal.

A fast-evaporating solvent used to carry actives and create a light, quick-drying texture in toners and washes. At the concentrations used in rinse-off and brief-contact formulas, it has a well-established safety record, though repeated contact with high-concentration formulas can be drying.

Pentylene glycol is a humectant and solvent that also offers mild antimicrobial support in formulas. It is generally well tolerated, with only rare reports of irritation, mostly in already sensitive or compromised skin.

A refined cellulose derivative processed from plant sources, used as a thickener and texturizing agent in cosmetics. It is an inert polysaccharide with no known sensitization or irritation potential and is widely used in personal care and pharmaceutical formulations.

A sugar alcohol humectant that draws water into the skin to support hydration. Erythritol is also used in food products and has a strong history of safety in both food and cosmetic use, with no meaningful irritation signals.

A polysaccharide extracted from red seaweed used to thicken and stabilize formulas. It is well tolerated in topical cosmetics; concerns from food ingestion studies are not directly applicable to cosmetic use. People with seaweed sensitivities should patch test.

A chemically modified form of hyaluronic acid that improves stability and penetration in skincare formulations. Clinical assessments show it hydrates skin effectively and is well tolerated across sensitive and normal skin types.

A humectant that holds water at the skin surface for a more hydrated look. No safety concern.

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 chemically cross-linked form of sodium hyaluronate designed to remain on the skin surface longer and provide sustained hydration. It functions as a humectant and is well tolerated, with the same safety profile as standard hyaluronic acid.

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 lower molecular weight version of hyaluronic acid designed for better skin penetration. It has been extensively studied and shown to support skin hydration and barrier function with excellent tolerability in diverse formulations and skin types.

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