Methylsilanol PCA is a gentle, silicon-based humectant that helps hydrate and smooth the skin, often used in anti-aging products.
Irritation
low
Source
semi-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
Methylsilanol PCA is a gentle, silicon-based humectant that helps hydrate and smooth the skin, often used in anti-aging products.
Irritation
low
Source
semi-synthetic
A gentle microalgae extract that helps hydrate and condition skin, though research is still emerging.
Irritation
low
Source
natural
Humectant
THALASSIOSIRA AESTIVALIS/GRAVIDA/NITZSCHIOIDES/NORDENSKIOELDII/ROTULA EXTRACT
A blend of marine microalgae that helps hydrate and protect the skin with antioxidant benefits, though research on this specific mix is still emerging.
Irritation
low
Source
natural
Milk ferment is a probiotic ingredient that gently hydrates and supports a healthy skin barrier, making it a good choice for sensitive or dry skin.
Irritation
low
Source
natural
Milk protein is a gentle, natural humectant that helps hydrate and soften skin, but it offers only temporary surface benefits and may not suit those with dairy allergies.
Irritation
low
Source
natural
A gentle, protein-rich ingredient that helps hydrate and temporarily smooth the skin's surface, but may not be suitable for those with dairy allergies.
Irritation
low
Source
natural
Milt extract is a novel, protein-packed ingredient that may help hydrate and plump skin, but research is limited and it may not suit everyone due to its animal origin.
Irritation
low
Source
natural
Molasses extract is a gentle humectant that helps hydrate and soothe the skin, but research on its cosmetic benefits is still limited.
Irritation
low
Source
natural
A gentle, water-based fruit juice that adds light hydration and antioxidant protection, but research on its skincare benefits is still limited.
Irritation
low
Source
natural
A mild, sugar-based humectant that hydrates without irritation, making it a good option for sensitive or dry skin.
Irritation
low
Source
semi-synthetic
A gentle, hydrating seaweed extract that helps skin retain moisture and may calm irritation.
Irritation
low
Source
natural
A gentle seaweed extract that helps hydrate and calm the skin, though research is still emerging.
Irritation
low
Source
natural
A gentle, protein-rich extract that helps hydrate and temporarily smooth the skin's surface, but research on its benefits is still emerging.
Irritation
low
Source
natural
A gentle fungal extract that helps hydrate and condition skin, but research is still early.
Irritation
low
Source
biotech
Humectant
Bacillus/Lactobacillus/Saccharomyces/Colloidal Gold/Hyaluronic Acid/Rice Bran Ferment Filtrate
A fermented blend that may support skin hydration and barrier function, but research on its unique gold and multi-strain combination is still emerging.
Irritation
low
Source
biotech
Skin conditioning agent
SACCHAROMYCES/RHODOBACTER/LACTOBACILLUS/LEUCONOSTOC/STREPTOMYCES GRISEUS/ASPERGILLUS/BACILLUS FERMENT FILTRATE
A multi-strain fermented ingredient that may help balance skin microbiome and improve hydration, but research is mostly on individual strains rather than this exact blend.
Irritation
low
Source
biotech
Humectant
KLUYVEROMYCES/LACTOBACILLUS/LACTOCOCCUS/LEUCONOSTOC/SACCHAROMYCES/HYDROLYZED RICE PROTEIN FERMENT FILTRATE
A gentle, fermented multi-strain ingredient that hydrates and supports the skin barrier without irritation.
Irritation
low
Source
biotech
Humectant
KLUYVEROMYCES/LACTOBACILLUS/LACTOCOCCUS/LEUCONOSTOC/SACCHAROMYCES/HYDROLYZED WHEAT GLUTEN FERMENT FILTRATE
A fermented probiotic-wheat complex that helps hydrate and calm the skin, but those with gluten sensitivity should be cautious.
Irritation
low
Source
biotech
A gentle, plant-derived amino acid blend that helps hydrate and support the skin barrier without irritation.
Irritation
low
Source
natural
Humectant
Ethyl Carbazido Hyaluronate, SH-Oligopeptide-1, SH-Polypeptide-94, Dipeptide-35, SH-Polypeptide-95
A multi-ingredient blend that combines modified hyaluronic acid with peptides for potential hydration and skin-smoothing benefits, though research on this exact mix is limited.
Irritation
low
Source
semi-synthetic
Humectant
ACETOBACTER/BACILLUS/LACTOBACILLUS/SACCHAROMYCES/STREPTOCOCCUS/FRUIT/LEAF/IMPERATA CYLINDRICA ROOT/SEED/BROCCOLI/ERIOCEPHALUS PUNCTULATUS/MISTLETOE/ACRYLATES C10-30 ALKYL ACRYLATES CROSSPOLYMER/ALPHA-GLUCAN/BETAINE/BUTYLENE GLYCOL/EPIGALLOCATECHIN GALLATYL GLUCOSIDE/GLYCERETH-26/GLYCERIN/GLUCOSYL CERAMIDE/GLUCOSYL HESPERIDIN/HYDROLYZED HYALURONIC ACID/MALTODEXTRIN/PANTHENOL/SCLEROTIUM GUM/TROMETHAMINE/XANTHAN GUM FERMENT FILTRATE
A complex ferment blend that hydrates, soothes, and supports skin barrier health with multiple probiotic and botanical actives.
Irritation
low
Source
mixed
Humectant
KLUYVEROMYCES/LACTOBACILLUS/LACTOCOCCUS/LEUCONOSTOC/SACCHAROMYCES LAC FERMENT FILTRATE
A gentle, fermented ingredient that helps hydrate and support the skin's natural barrier without irritation.
Irritation
low
Source
biotech
Exfoliant
LACTOBACILLUS/LEUCONOSTOC/ACETOBACTER/KLUYVEROMYCES/SACCHAROMYCES MILK FERMENT FILTRATE
A gentle, multi-strain milk ferment that exfoliates and hydrates without harshness, ideal for sensitive skin looking for a mild glow.
Irritation
low
Source
biotech
Mung Bean Seed Water is a gentle, antioxidant-rich base ingredient that hydrates and soothes, but its benefits are not as well-studied as more common humectants like glycerin.
Irritation
low
Source
natural
A gentle film-forming ingredient that locks in moisture and leaves skin feeling smooth without clogging pores.
Irritation
low
Source
semi-synthetic
A gentle, hydrating film-former that leaves skin feeling smooth and plumped without stickiness — ideal for sensitive or dry skin types.
Irritation
low
Source
semi-synthetic
Nahocol D is a gentle, algae-derived humectant that helps hydrate and condition skin, though research on its benefits is still emerging.
Irritation
low
Source
natural
A gentle, algae-derived ingredient that helps hydrate and protect skin, but research on its specific benefits is still emerging.
Irritation
low
Source
natural
A gentle, hydrating botanical water with antioxidant properties, best for soothing and refreshing normal to dry skin.
Irritation
low
Source
natural
A well-researched, multi-tasking vitamin that strengthens skin, fades dark spots, and calms redness without irritation.
Irritation
low
Source
synthetic
A gentle dual-action ingredient that combines niacinamide's barrier support with lactic acid's mild exfoliation for smoother, brighter skin.
Irritation
low
Source
semi-synthetic
A gentle, dual-action ingredient that exfoliates and supports the skin barrier without the irritation of standalone acids.
Irritation
low
Source
semi-synthetic
A gentle, multi-tasking ingredient that combines niacinamide's brightening and barrier-supporting benefits with yeast peptides for added hydration and skin-smoothing effects.
Irritation
low
Source
semi-synthetic
A gentle, microbiome-friendly sugar that hydrates and helps balance skin bacteria without irritation.
Irritation
low
Source
biotech
A hydrating, soothing extract from a unique cyanobacterium, but research on its cosmetic benefits is still emerging.
Irritation
low
Source
natural
A gentle algae extract that helps hydrate skin and defend against environmental stress, though research is still early.
Irritation
low
Source
natural
Oat kernel protein is a gentle, hydrating ingredient that supports the skin barrier and soothes dryness without irritation.
Irritation
low
Source
natural
Okra Fruit Extract is a gentle, hydrating ingredient that forms a light film on skin to help lock in moisture and calm irritation.
Irritation
low
Source
natural
Okra Seed Extract is a gentle, hydrating ingredient that helps attract moisture to the skin, but research on its benefits is still emerging.
Irritation
low
Source
natural
A gentle fermented ingredient that helps hydrate and support the skin barrier without irritation.
Irritation
low
Source
biotech
Olive sap extract is a gentle, hydrating ingredient with antioxidant potential, but research is limited compared to more established olive-derived ingredients like olive oil or leaf extract.
Irritation
low
Source
natural
Humectant
Water, Butylene Glycol, Glycerin, Dipropylene Glycol, PEG-60 Hydrogenated Castor Oil, Phenoxyethanol, Chlorphenesin, Sodium Hyaluronate, Hydrolyzed Collagen, Aloe Barbadensis Leaf Extract, Camellia Sinensis Leaf Extract, Chamomilla Recutita (Matricaria) Flower Extract, Rosmarinus Officinalis (Rosemary) Leaf Extract, Thymus Vulgaris (Thyme) Extract, Salvia Officinalis (Sage) Leaf Extract, Lavandula Angustifolia (Lavender) Flower Extract, Citrus Limon (Lemon) Fruit Extract, Citrus Aurantium Dulcis (Orange) Fruit Extract, Citrus Paradisi (Grapefruit) Fruit Extract, Vitis Vinifera (Grape) Seed Extract, Tocopherol, Ascorbic Acid, Retinyl Palmitate, Biotin, Folic Acid, Niacinamide, Panthenol, Pyridoxine HCl, Riboflavin, Thiamine HCl, Cyanocobalamin, Zinc PCA, Copper PCA, Magnesium PCA, Manganese PCA, Potassium PCA, Silica, Sodium PCA, Hydrolyzed Elastin, Hydrolyzed Keratin, Hydrolyzed Silk, Hydrolyzed Wheat Protein, Hydrolyzed Soy Protein, Hydrolyzed Rice Protein, Hydrolyzed Oat Protein, Hydrolyzed Corn Protein, Hydrolyzed Potato Protein, Hydrolyzed Yeast Protein, Hydrolyzed Milk Protein, Hydrolyzed Egg Protein, Hydrolyzed Fish Collagen, Hydrolyzed Shark Cartilage, Hydrolyzed Chondroitin Sulfate, Hydrolyzed Glycosaminoglycans, Hydrolyzed Hyaluronic Acid, Hydrolyzed Keratin, Hydrolyzed Silk, Hydrolyzed Wheat Protein, Hydrolyzed Soy Protein, Hydrolyzed Rice Protein, Hydrolyzed Oat Protein, Hydrolyzed Corn Protein, Hydrolyzed Potato Protein, Hydrolyzed Yeast Protein, Hydrolyzed Milk Protein, Hydrolyzed Egg Protein, Hydrolyzed Fish Collagen, Hydrolyzed Shark Cartilage, Hydrolyzed Chondroitin Sulfate, Hydrolyzed Glycosaminoglycans, Hydrolyzed Hyaluronic Acid
Onsen-Sui is a multi-ingredient blend that mimics the benefits of hot spring water, offering hydration, soothing effects, and a cocktail of antioxidants and nutrients for the skin.
Irritation
low
Source
mixed
Ornithine is a gentle amino acid that helps maintain skin hydration and supports a healthy skin barrier.
Irritation
low
Source
natural
Orotic acid is a gentle hydrating ingredient with some antioxidant potential, but research on its topical benefits is still limited.
Irritation
low
Source
natural
A gentle, hydrating ferment that may help soothe skin and support a healthy moisture barrier.
Irritation
low
Source
natural
Ozonized glycerin is a gentle, multi-tasking ingredient that hydrates while offering soothing and antimicrobial benefits, making it a promising option for acne-prone or sensitive skin.
Irritation
low
Source
semi-synthetic
A gentle, nutrient-packed seaweed powder that hydrates and soothes skin without irritation.
Irritation
low
Source
natural
A lipid-modified hyaluronic acid that may cling to skin longer than standard hyaluronic acid, offering targeted hydration.
Irritation
low
Source
semi-synthetic
Pantethine is a gentle, moisturizing derivative of vitamin B5 that helps support the skin barrier and calm irritation.
Irritation
low
Source
semi-synthetic
Panthenol is a well-tolerated humectant that helps hydrate and soothe the skin while supporting the skin barrier.
Irritation
low
Source
semi-synthetic
Panthenyl Ethyl Ether is a gentle, modified form of vitamin B5 that helps hydrate and condition skin without the stickiness of traditional humectants.
Irritation
low
Source
semi-synthetic
A gentle, advanced version of panthenol that helps hydrate and soothe skin with better absorption than standard pro-vitamin B5.
Irritation
low
Source
semi-synthetic
Pantolactone is a gentle humectant that helps skin retain moisture and improves product texture, but it's less studied than its parent compound, panthenol.
Irritation
low
Source
semi-synthetic
Pantothenamide MEA is a gentle, vitamin B5-derived humectant that helps hydrate and soothe the skin without common irritation.
Irritation
low
Source
semi-synthetic
Pantothenic acid is a gentle, water-soluble vitamin that helps hydrate and soothe the skin, making it a solid choice for most skin types, especially dry or sensitive skin.
Irritation
low
Source
natural
A gentle, hydrating blend of vitamin B5 and yeast peptides that helps calm and moisturize the skin.
Irritation
low
Source
biotech
A dual-action ingredient that gently exfoliates dead skin cells while helping to calm and hydrate the skin.
Irritation
moderate
Source
mixed
A gentle, probiotic-based exfoliant that brightens and hydrates without harsh chemicals.
Irritation
low
Source
biotech
Papaya Fruit Water offers gentle hydration and mild enzymatic exfoliation, but its benefits are less concentrated than papaya extract or pure enzymes.
Irritation
low
Source
natural
A gentle, algae-derived humectant that helps hydrate and soothe the skin while forming a light protective film.
Irritation
low
Source
natural