A gentle, water-binding ingredient that helps keep skin hydrated and improves product feel without common irritation.
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 gentle, water-binding ingredient that helps keep skin hydrated and improves product feel without common irritation.
Irritation
low
Source
synthetic
A gentle, synthetic humectant that helps hydrate the skin and improve product feel without common irritation concerns.
Irritation
low
Source
synthetic
A gentle, synthetic humectant that draws moisture to the skin without common irritation.
Irritation
low
Source
synthetic
A gentle synthetic humectant that hydrates the skin and improves the feel of cosmetic formulas without common irritation.
Irritation
low
Source
synthetic
A gentle, synthetic humectant that draws moisture into the skin without the sticky feel of glycerin.
Irritation
low
Source
synthetic
A gentle, water-attracting ingredient that helps keep skin hydrated without clogging pores or causing irritation.
Irritation
low
Source
semi-synthetic
A gentle, synthetic humectant that pulls water into the skin and improves the feel of your products without common irritation.
Irritation
low
Source
synthetic
A gentle, semi-synthetic humectant that helps hydrate the skin without clogging pores, making it a good option for most skin types.
Irritation
low
Source
semi-synthetic
A gentle, synthetic humectant that draws moisture into the skin without the sticky feel of glycerin.
Irritation
low
Source
synthetic
A gentle, synthetic humectant that draws moisture to the skin and helps other ingredients absorb better.
Irritation
low
Source
synthetic
A gentle, synthetic humectant that draws moisture to the skin without the stickiness of glycerin.
Irritation
low
Source
synthetic
A gentle, synthetic humectant that helps hydrate skin and improve product feel without common irritation risks.
Irritation
low
Source
synthetic
A gentle, synthetic humectant that draws moisture to the skin without the sticky feel of glycerin.
Irritation
low
Source
synthetic
PPG-69 is a gentle synthetic humectant that helps keep skin hydrated without clogging pores, but it offers no unique benefits over more common alternatives.
Irritation
low
Source
synthetic
A gentle, synthetic humectant that draws moisture into the skin without the stickiness of glycerin.
Irritation
low
Source
synthetic
A synthetic humectant that helps keep skin hydrated and improves product texture, but offers no unique benefits over more common alternatives.
Irritation
low
Source
synthetic
A gentle, synthetic humectant that helps hydrate skin without clogging pores or causing irritation.
Irritation
low
Source
synthetic
A gentle, synthetic humectant that attracts moisture to the skin without the sticky feel of glycerin.
Irritation
low
Source
synthetic
A gentle, synthetic humectant that attracts moisture to the skin without common irritation or clogging.
Irritation
low
Source
synthetic
A gentle, water-based extract that provides hydration and antioxidant protection, especially suitable for dry or sensitive skin.
Irritation
low
Source
natural
A gentle, antioxidant-rich water that hydrates and soothes the skin without clogging pores.
Irritation
low
Source
natural
A gentle, plant-based hydrator with antioxidant benefits, ideal for dry or sensitive skin types.
Irritation
low
Source
natural
A gentle, water-rich humectant that hydrates and soothes skin with antioxidant support, ideal for sensitive or dehydrated skin types.
Irritation
low
Source
natural
A gentle, antioxidant-rich plant water that hydrates and soothes skin without clogging pores.
Irritation
low
Source
natural
Proline is a gentle, hydrating amino acid that supports skin structure and moisture retention.
Irritation
low
Source
natural
Propanediol is a gentle, plant-based alternative to propylene glycol that hydrates the skin and helps other ingredients work better.
Irritation
low
Source
natural
A gentle, modified collagen amino acid that helps hydrate and support skin firmness without irritation.
Irritation
low
Source
semi-synthetic
A gentle synthetic humectant that helps hydrate skin and improve product feel without common irritation.
Irritation
low
Source
synthetic
Propylene glycol is a widely used, effective humectant and solvent, but it can be irritating for sensitive skin at high concentrations.
Irritation
moderate
Source
synthetic
A gentle, water-attracting ingredient that helps keep skin hydrated and balanced without common irritations.
Irritation
low
Source
semi-synthetic
A gentle, natural humectant from South African protea flowers that helps hydrate skin, but research on its specific benefits is still limited.
Irritation
low
Source
natural
A gentle, water-like ingredient from flowering plum fruit that adds light hydration and a touch of antioxidants, but lacks strong clinical backing.
Irritation
low
Source
natural
Psicose is a gentle, natural humectant that helps hydrate skin and may offer antioxidant benefits, though research in cosmetics is still limited.
Irritation
low
Source
natural
A gentle, hydrating seaweed extract that helps skin retain moisture and feel smoother.
Irritation
low
Source
natural
A gentle, fermented ingredient that helps hydrate and soothe the skin while supporting a healthy moisture barrier.
Irritation
low
Source
biotech
A gentle, hydrating algae extract that may help soothe and moisturize skin, but research is still limited.
Irritation
low
Source
natural
A gentle, hydrating blend that combines pumpkin's natural enzymes with beta-glucan's soothing power—great for a brighter, smoother complexion without harsh irritation.
Irritation
low
Source
natural
Pumpkin fruit juice is a gentle, water-based hydrator with mild antioxidant benefits, but its effects are mostly from its water content and trace nutrients.
Irritation
low
Source
natural
A synthetic ingredient that may help hydrate and support the skin barrier, but research is still early.
Irritation
low
Source
synthetic
Quince fruit juice is a gentle, hydrating ingredient with antioxidant properties, but research on its skincare benefits is still emerging.
Irritation
low
Source
natural
Quince fruit water is a mild, hydrating botanical water that can soothe and lightly moisturize skin, but it lacks strong clinical evidence for dramatic effects.
Irritation
low
Source
natural
A gentle, plant-based hydrator that forms a light, soothing film on the skin to help lock in moisture.
Irritation
low
Source
natural
A gentle, probiotic-derived ingredient that may help strengthen the skin barrier and improve hydration, though research is still emerging.
Irritation
low
Source
biotech
A gentle, yeast-derived peptide that helps hydrate and support the skin barrier, but research is still emerging.
Irritation
low
Source
biotech
Raffinose is a gentle, plant-derived sugar that hydrates the skin and feeds beneficial bacteria, making it a smart choice for sensitive or microbiome-focused routines.
Irritation
low
Source
natural
Raffinose Oleate is a gentle, sugar-based ingredient that hydrates and soothes the skin, making it a promising option for sensitive or dry skin types.
Irritation
low
Source
semi-synthetic
A gentle, hydrating marine extract that may help soothe and protect the skin, though research is still emerging.
Irritation
low
Source
natural
Humectant
Hydrolyzed Gelidium Elegans/Gracilaria Vermiculophylla/Gracilaria Gigas/Pterocladiella Capillacea/Ahnfeltia Plicata Extract
A gentle, multi-species red algae extract that helps hydrate and soothe skin while forming a light protective film.
Irritation
low
Source
natural
A gentle, hydrating algae extract that helps skin retain moisture and may calm irritation.
Irritation
low
Source
natural
A gentle, hydrating seaweed extract that helps soothe skin and support moisture retention without irritation.
Irritation
low
Source
natural
A gentle, algae-derived humectant that pulls moisture into the skin and may help calm irritation.
Irritation
low
Source
natural
A gentle, ocean-derived powder that helps hydrate and calm the skin, making it a good choice for sensitive or dry skin types.
Irritation
low
Source
natural
A mild, plant-based water that provides light hydration and soothing benefits, ideal for sensitive or dry skin types.
Irritation
low
Source
natural
A gentle, plant-derived humectant that helps hydrate and calm the skin, though research on its benefits is still emerging.
Irritation
low
Source
natural
Rhamnose is a gentle plant-derived sugar that helps hydrate and lightly exfoliate skin, making it a good option for sensitive skin looking for mild renewal.
Irritation
low
Source
natural
Humectant
RHIZOPUS/SACCHAROMYCES/COLLAGEN FERMENT FILTRATE
A fermented collagen ingredient that may help hydrate and condition skin, but research is still early and benefits are not yet proven in large human studies.
Irritation
low
Source
biotech
A gentle marine extract that helps hydrate and calm the skin, but research is still early.
Irritation
low
Source
natural
A gentle, hydrating microalgae extract that helps skin retain moisture and defends against environmental stress.
Irritation
low
Source
natural
A gentle, hydrating fruit water with mild antioxidant benefits, best for normal to dry skin types.
Irritation
low
Source
natural
Ribose is a gentle sugar molecule that may help energize skin cells and improve hydration, but human research is still limited.
Irritation
low
Source
natural