A widely used, low-irritation humectant that helps products feel smooth and hydrating without being sticky.
Irritation
low
Source
synthetic
Beauty ingredient research
Browse the review database to understand what an ingredient is, what it does in a beauty formula, when it is useful, and when it deserves caution across skincare, haircare, bodycare, makeup, and more.
20769
Reviewed ingredients
524
Low-concern standouts
2884
Need usage caution
A widely used, low-irritation humectant that helps products feel smooth and hydrating without being sticky.
Irritation
low
Source
synthetic
Butylglycerin is a gentle, synthetic humectant that pulls moisture into the skin and improves product feel without common irritation.
Irritation
low
Source
synthetic
Butyric acid is an emerging skincare ingredient that may support a healthy skin microbiome, but research is still early and it can be irritating at higher concentrations.
Irritation
moderate
Source
natural
A synthetic humectant that helps hydrate skin, but research on its long-term effects is still limited.
Irritation
low
Source
synthetic
A next-gen hyaluronic acid that sticks to skin longer for lasting hydration without greasiness.
Irritation
low
Source
semi-synthetic
A gentle, antioxidant-rich water from cacao seeds that hydrates and soothes skin without the heaviness of cocoa butter.
Irritation
low
Source
natural
Calcium Aspartate is a gentle mineral-amino acid ingredient that may help support skin hydration and barrier function, but research is still early.
Irritation
low
Source
synthetic
A gentle humectant and mild exfoliant that hydrates without irritation, but research is still limited.
Irritation
low
Source
semi-synthetic
A gentle, hydrating mineral that helps calm the skin and support its natural barrier without irritation.
Irritation
low
Source
synthetic
Calcium lactate is a gentle, hydrating exfoliant that helps smooth skin without the sting of stronger acids.
Irritation
low
Source
synthetic
A stable, water-soluble form of Vitamin B5 that helps hydrate and soothe the skin without irritation.
Irritation
low
Source
synthetic
A gentle, plant-based humectant that holds water on the skin's surface, offering a smoother feel and lasting hydration without stickiness.
Irritation
low
Source
biotech
A next-generation humectant that forms a flexible, breathable film to lock in moisture without the stickiness of traditional hyaluronic acid.
Irritation
low
Source
biotech
Calf Skin Extract is a protein-rich ingredient that may help moisturize and temporarily smooth skin, but it lacks strong research and raises ethical and sourcing concerns.
Irritation
low
Source
natural
A gentle red seaweed extract that helps hydrate skin and may offer antioxidant protection, but research is still early.
Irritation
low
Source
natural
A gentle red seaweed extract that helps hydrate and calm the skin, though research is still limited.
Irritation
low
Source
natural
A gentle, antioxidant-rich botanical water that hydrates and soothes skin without irritation.
Irritation
low
Source
natural
A gentle, hydrating water from the camellia plant that soothes and refreshes skin without irritation.
Irritation
low
Source
natural
A gentle, hydrating water that provides antioxidant benefits and helps soothe the skin, making it a great base for sensitive skin formulas.
Irritation
low
Source
natural
Humectant
SACCHAROMYCES/CAMELLIA JAPONICA SEED OIL/GLYCERIN FERMENT FILTRATE
A gentle, fermented ingredient that provides hydration and supports a healthy-looking skin barrier, though research is still emerging.
Irritation
low
Source
biotech
A gentle, plant-derived humectant that pulls moisture into the skin and may offer mild antioxidant benefits.
Irritation
low
Source
natural
Camphanediol is a synthetic humectant that helps hydrate the skin and improve product feel, with low irritation potential but limited research.
Irritation
low
Source
synthetic
A gentle, water-loving fruit extract that helps hydrate skin and provides a modest dose of antioxidants, but its benefits are mild compared to more concentrated active ingredients.
Irritation
low
Source
natural
A mild, multifunctional ingredient that hydrates skin and helps preserve formulas without the irritation of traditional preservatives.
Irritation
low
Source
synthetic
Carbocysteine is a gentle, hydrating amino acid derivative that may help support skin barrier health, but research in topical cosmetics is still limited.
Irritation
low
Source
synthetic
A gentle, water-loving amino-acid derivative that helps hydrate and calm the skin, but research is still early.
Irritation
low
Source
synthetic
A gentle, water-soluble chitosan derivative that hydrates and forms a protective film on skin, with some soothing and antioxidant potential.
Irritation
low
Source
semi-synthetic
A gentle, water-loving derivative of chitosan that helps hydrate and form a protective film on the skin, with early research suggesting soothing benefits.
Irritation
low
Source
semi-synthetic
A gentle, biotech-derived film former that helps lock in moisture and may soothe the skin without clogging pores.
Irritation
low
Source
biotech
A gentle, water-loving ingredient that pulls moisture into the skin and helps maintain a healthy barrier.
Irritation
low
Source
semi-synthetic
A gentle red algae extract that helps hydrate and soothe the skin, with emerging research on its antioxidant potential.
Irritation
low
Source
natural
Carrot Root Juice is a gentle, water-based ingredient that hydrates and provides antioxidant benefits, but its effects are mild compared to concentrated extracts or oils.
Irritation
low
Source
natural
A gentle, antioxidant-rich water from carrots that hydrates and soothes skin without irritation.
Irritation
low
Source
natural
A gentle, plant-based polysaccharide that helps hydrate and form a protective film on the skin, making it a good option for sensitive or dry skin types.
Irritation
low
Source
natural
A gentle, sugar-based humectant that helps hydrate skin without stickiness, though research is still emerging.
Irritation
low
Source
semi-synthetic
A gentle red algae extract that helps hydrate and calm the skin, but research on its specific benefits is still limited.
Irritation
low
Source
natural
A gentle marine extract that may help hydrate and calm the skin, but research is still early.
Irritation
low
Source
natural
A gentle, plant-based humectant that helps hydrate and soothe the skin, with antioxidant benefits to protect against environmental stress.
Irritation
low
Source
natural
A gentle, hydrating cactus fruit juice with antioxidant potential, best for dry or sensitive skin types.
Irritation
low
Source
natural
Cetyl PCA is a gentle humectant that pulls moisture into the skin and leaves it feeling smooth without greasiness.
Irritation
low
Source
semi-synthetic
A gentle seaweed extract that helps hydrate and protect the skin with antioxidants, suitable for most skin types.
Irritation
low
Source
natural
A gentle, hydrating base ingredient from cherries that offers mild antioxidant benefits and a subtle fruity scent, but lacks strong clinical evidence for dramatic skin changes.
Irritation
low
Source
natural
Chia seed powder offers gentle physical exfoliation and a boost of hydration, making it a mild choice for most skin types.
Irritation
low
Source
natural
A gentle, plant-derived humectant that hydrates skin and may help balance the skin microbiome.
Irritation
low
Source
natural
Chitosan is a gentle, natural film-former that helps lock in moisture and can provide a light, protective barrier on skin or hair.
Irritation
low
Source
natural
A novel hybrid ingredient that pairs chitosan's film-forming and hydrating properties with glutathione's antioxidant potential, though research on this specific conjugate is still limited.
Irritation
low
Source
semi-synthetic
A gentle fermented ingredient that may help hydrate and soothe skin, though research is still limited.
Irritation
low
Source
biotech
A gentle marine extract that helps hydrate and protect the skin, but research is still early.
Irritation
low
Source
natural
A gentle, hydrating seaweed extract that helps soothe and moisturize the skin without clogging pores.
Irritation
low
Source
natural
Citrulline is a gentle, hydrating amino acid that helps maintain skin moisture and supports a healthy skin barrier.
Irritation
low
Source
natural
A gentle, antioxidant-rich fruit water that hydrates and refreshes without heavy oils, but its benefits are based more on tradition than robust clinical studies.
Irritation
low
Source
natural
A gentle, hydrating seaweed-derived ingredient that helps soothe skin and lock in moisture without clogging pores.
Irritation
low
Source
natural
A gentle marine ferment that helps hydrate and support the skin barrier, but research is still early.
Irritation
low
Source
biotech
A biotech marine ingredient that mimics the skin's natural moisture-holding molecules, offering gentle hydration and a plumping effect.
Irritation
low
Source
biotech
A gentle fermented ingredient that helps hydrate and support the skin barrier, ideal for sensitive and dry skin types.
Irritation
low
Source
biotech
A gentle, natural humectant that helps skin retain moisture, but research on its cosmetic benefits is still limited.
Irritation
low
Source
natural
A gentle, hydrating extract from coconut fruit that helps soften and soothe skin without the heavy feel of coconut oil.
Irritation
low
Source
natural
Coconut fruit juice is a gentle, hydrating ingredient that provides light moisture and soothing benefits, ideal for most skin types.
Irritation
low
Source
natural
A gentle seaweed powder that helps hydrate and soothe the skin, but research on its benefits is still limited.
Irritation
low
Source
natural
Collagen is a popular moisturizing ingredient that helps skin feel plump and hydrated, but it cannot directly replace lost collagen in the skin.
Irritation
low
Source
natural