ND1

A lightweight, odorless emollient made by combining coconut or palm-derived fatty acids with glycerin. It spreads easily, feels non-greasy, and has a long history of use in skin and hair products with no meaningful irritation or sensitization signal.

A natural plant-derived starch that absorbs moisture and adds texture to powders and dry formulations. It is derived from cassava root and is well-tolerated in topical cosmetic applications.

A fatty alcohol derived from stearic acid that thickens creams and gives them a smooth, non-greasy glide. It is one of the fatty alcohols the CIR panel reviewed together and found safe as used, with a very low reported rate of contact sensitization.

A rich, solid-at-room-temperature oil that deeply softens dry skin and hair. It is well tolerated overall, but its high lauric acid content is considered comedogenic by many dermatologists, so it can trigger breakouts in people who are acne-prone.

A rich plant butter pressed from shea tree nuts, valued for softening and cushioning dry skin. It is generally well tolerated, though very rare allergic reactions have been reported and people with tree nut allergies who are cautious may want to patch test first.

A linoleic-acid-rich plant oil used as an emollient and, in some small pediatric studies, associated with support of the skin barrier when applied to infant skin. It is well tolerated with a low reported rate of contact reactions.

A thickening emulsifier derived from castor oil that has been saturated with hydrogen for stability. It helps form creams and lotions while conditioning the skin. CIR and EU assessments support its safety in cosmetics at typical use levels.

A citrate ester used as a solvent and plasticizer in cosmetics to dissolve active ingredients and adjust texture. It is well tolerated and widely used in formulations without documented safety concerns.

A long-chain fatty alcohol used to thicken and stabilize creams and soften skin. It is a waxy emollient, not a drying solvent, and is graded low concern in published assessments.

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.

An emulsifier made from glycerin and stearic acid that stabilizes oil-in-water and water-in-oil formulations. It has a long history of safe use in cosmetics and is assessed as a low-concern ingredient in published safety reviews.

A wax ester derived from jojoba oil that closely resembles the skin's own sebum esters, used to soften and smooth skin. Available safety data has not flagged meaningful irritation or sensitization risk at cosmetic use levels.

A liquid wax extracted from jojoba seeds that closely mirrors skin sebum, widely used to soften and condition the skin barrier. It is generally well tolerated and suitable for most skin types.

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

A sugar alcohol humectant that helps retain moisture in the skin. It is well-tolerated at typical cosmetic use levels.

A natural fragrance component found in citrus oils and lemongrass, giving a lemony scent. It is a named EU fragrance allergen that can oxidize into potent contact allergens over time; people with known fragrance sensitivities may react.

A rose-scented fragrance ingredient found naturally in geranium and rose oil. It is one of the 26 fragrance allergens the EU requires to be labeled by name because a minority of people develop skin sensitization to it, though most users tolerate it without issue.

A citrus essential oil with a fresh scent, extracted from lemon peel. It contains recognized fragrance allergen constituents (limonene, citral) and can trigger contact reactions in fragrance-sensitive individuals. Additionally, citrus peel oils carry documented phototoxicity risk, meaning skin treated with the product should avoid direct sunlight.

A floral, rose-like fragrance compound found in many essential oils. It is one of the 26 EU-designated fragrance allergens, meaning a documented minority of people can develop contact sensitization, so brands must disclose it above set thresholds.

Hydroxycitronellal is a lily-of-the-valley scented fragrance ingredient on the EU allergen disclosure list. It has well-documented sensitizing potential in patch-test studies, so it is worth checking the label if you have known fragrance sensitivities.

A citrus-scented fragrance component. Fine for most, but it oxidizes over time into a known contact allergen, so it must be labelled in the EU.

An ester component found in lavender and other botanical fragrances. It is one of the EU's named fragrance allergens due to documented contact sensitization in dermatitis patients, particularly after oxidation and degradation of the parent materials over time.

A floral fragrance component and one of the EU-labelled fragrance allergens. Usually fine, worth watching if you react to scented products.