Glossary · Labelling & formulation
The three ways a moisturiser works. Humectants such as glycerin and hyaluronic acid attract water into the skin; emollients such as squalane soften and smooth; occlusives form a film that slows water loss.
Sources: 1
Getting this right early shapes the formula, the label and the claims, and avoids costly reformulation once a product is close to launch.
Guires CSL formulation, testing, clinical and regulatory teams work with Humectants, emollients & occlusives on client projects every week, from the first brief to the final product file.
Hydration & barrier repairRelated terms
The standard ingredient names used on cosmetic labels in the EU, US, ASEAN and many other markets, assigned by the INCI committee of the Personal Care Products Council.
Read definition →The ISO guidelines on technical definitions and criteria for natural and organic cosmetic ingredients (Part 1, 2016) and the way to calculate natural and organic origin indexes for ingredients and products (Part 2, 2017).
Read definition →A measure of acidity or alkalinity on a scale of 0 to 14.
Read definition →A dispersion of oil and water held together by emulsifiers, either oil-in-water (most lotions and creams) or water-in-oil (richer, water-resistant textures).
Read definition →Regulations and standards are listed first, then peer-reviewed literature. Sources checked October 2026.
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