Sound Renewal Serum Cream

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

A corn-derived solvent and humectant that has largely replaced propylene glycol in "clean" formulas; CIR reviewed the alkane diol group and found use concentrations up to about 40 percent in leave-on products like deodorant sticks with no meaningful irritation signal.

An ester commonly used as a skin-conditioning agent and emollient in cosmetics. Evidence from cosmetic use indicates it is well-tolerated across skin types and helps soften and smooth the skin.

A diester formed from malic acid and isostearyl alcohol. It conditions and smooths skin with no known safety issues in cosmetic use.

A mild emulsifier derived from plant glycerin and stearic acid that is widely used in natural and clean formulations. Published assessments show it to be well tolerated with no known safety concerns at cosmetic use levels.

A blend of cetyl and stearyl fatty alcohols used to thicken lotions and soften skin. It is chemically unrelated to drying alcohols like ethanol, and the CIR expert panel has found fatty alcohols safe as used in cosmetics.

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 stable, saturated version of squalene, a lipid the skin already produces, now usually sourced from olives or sugarcane instead of shark liver. It is very well tolerated across skin types and helps reinforce the skin barrier.

A signal peptide attached to palmitic acid that activates collagen synthesis in skin cells. Well tolerated across skin types with no significant safety concerns in cosmetic use.

A peptide lipid that mimics collagen fragments and signals skin cells to increase collagen production while reducing inflammation. Established in anti-aging formulas with a consistent safety record.

A hexapeptide designed to reduce facial muscle contractions by interfering with acetylcholine release. Cosmetic-grade formulations show no systemic absorption at recommended use levels and are well tolerated.

A small peptide bonded to copper that supports collagen remodeling and skin repair. Studied in cosmetics and dermatology for decades with a strong safety record at cosmetic-use levels.

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

A broken-down form of hyaluronic acid with smaller molecules intended to penetrate more deeply into the skin. It functions as a humectant and is well tolerated, with the same safety profile as standard hyaluronic acid.

A plant extract long used in traditional wound care and now common in "cica" soothing products, valued for calming redness and supporting the skin barrier. It is generally well tolerated, with rare contact allergy reported.

A purified triterpene from Centella asiatica (the "cica" plant) used in soothing and barrier-support products, especially Korean formulas. It is well tolerated with a low reported irritation rate; the strong repair and anti-aging claims around it are more marketing than settled evidence.

A triterpenoid from Centella asiatica associated in published studies with skin resilience and wound-healing support. It is generally well tolerated in cosmetic concentrations.

A triterpenoid from Centella asiatica with published research linking it to skin barrier function and calming effects. It appears well tolerated at cosmetic levels.

A key active compound from Centella asiatica linked in published research to skin barrier support and soothing properties. It is well tolerated in skincare formulations.

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.

An energizing plant extract used in skincare preparations, known for antioxidant activity in cosmetic applications. Cosmetic safety assessments generally support its use, though like many botanical ingredients it may trigger reactions in very sensitive individuals.

Gluconolactone is a polyhydroxy acid that exfoliates gently while also acting as a humectant and mild antioxidant, and it is generally recommended for sensitive or barrier-compromised skin over smaller AHAs. A full cosmetic panel review found it safe as used, though some users still report mild stinging or redness at higher concentrations.

A lab-made version of a lipid naturally found in the outer skin barrier. It is added to creams and cleansers to help replace lipids that washing can strip away, and it is not linked to irritation or safety concerns.

A polyphenol antioxidant from grapes and berries, used in skincare to defend against environmental stress. Published assessments indicate it is well tolerated; it may also support the skin barrier when used consistently.

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

A seaweed-derived extract used to thicken and hydrate cosmetic formulas. It is well tolerated and has a long history of use in both skincare and food products.

A naturally occurring nucleoside used in anti-aging formulas, often marketed for smoothing the look of fine lines. It has a low irritation profile and no established hazard at cosmetic use levels.

An essential omega-6 fatty acid and key component of the skin barrier. Well documented as safe and beneficial in topical cosmetics, supporting skin integrity and hydration.

A polysaccharide extracted from yeast cell walls or oat bran. Used for hydration and skin conditioning, beta-glucan is well tolerated with emerging evidence for supporting skin barrier function. No safety concerns flagged in cosmetic use.

A leaf extract long used in Korean and Chinese folk medicine and popularized in K-beauty as "heartleaf." Small in-vitro and cell-culture studies suggest anti-inflammatory and antioxidant activity, but there is little rigorous human clinical trial data isolating the extract itself, so soothing claims should be read as plausible rather than proven.

A hydrating plant extract from sugarcane rich in amino acids and minerals. It conditions and softens skin and is generally well tolerated across skin types.

The simplest amino acid, naturally present in skin and collagen, commonly used as a humectant to help retain moisture. It has a long history of safe use in cosmetics with no known hazards at typical concentrations.

A basic amino acid naturally found in skin that draws moisture into the stratum corneum. It is well tolerated in cosmetics at typical concentrations and has been used safely in skincare formulations for decades.

A naturally occurring amino acid that is a key component of skin barrier lipids and the natural moisturizing factor. It binds water to the skin and is well established as a safe hydrating ingredient with no known sensitization concerns.

An essential branched-chain amino acid naturally found in skin and used as a humectant to help retain moisture. It is a recognized component of the natural moisturizing factor with a history of safe use in cosmetics at typical concentrations.

An amino acid used in skincare formulas to hydrate and condition the skin. Amino acids are well-tolerated at cosmetic use levels and have a long history of safe use.

An amino acid widely used in cosmetics for skin conditioning and moisture retention. It is well-studied and well-tolerated across skin types at cosmetic use levels.

An essential amino acid that is a component of the skin barrier and natural moisturizing factor, used in cosmetics to improve hydration. It is well tolerated and assessed as safe for topical application.

A branched-chain amino acid used in conditioning formulas to support skin hydration. No safety concern has been identified at typical cosmetic concentrations.

A non-essential amino acid that occurs naturally in skin and is used in cosmetics as a humectant and skin-conditioning agent. It has an established safety record with no reported concerns at typical usage levels.

An amino acid used in skin-conditioning formulas to support hydration and skin health. No documented safety concern at cosmetic use levels.

An amino acid abundant in collagen that functions as a humectant to draw moisture into the skin. It is well tolerated in skincare products and assessed as safe for cosmetic use at standard formulation levels.

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

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

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 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.

An amino acid derived emulsifier made from stearic acid and glutamic acid that is increasingly used in natural and clean formulations. It is mild, biodegradable, and presents no known safety concerns for cosmetic use.

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.

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.

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.

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 rheology modifier that thickens gels and serums while maintaining a lightweight, non-sticky feel. Provides suspension and stability in water-based formulas. Widely used and well tolerated.

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.

An emulsifier combining glyceryl stearate with citric acid to stabilize oil-water mixtures and moderate pH. Well tolerated in cosmetic formulas at standard use concentrations.