Sodium Toluenesulfonate is a synthetic helper ingredient that keeps cleansers clear and well-mixed, but it can be slightly drying for sensitive skin.
Irritation
moderate
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
Sodium Toluenesulfonate is a synthetic helper ingredient that keeps cleansers clear and well-mixed, but it can be slightly drying for sensitive skin.
Irritation
moderate
Source
synthetic
A gentle, sugar-based humectant that helps skin retain moisture and improves the feel of products without common irritation.
Irritation
low
Source
semi-synthetic
Sodium trichloroacetate is a synthetic pH adjuster with limited cosmetic research; it is generally safe at low concentrations but may be irritating in high amounts.
Irritation
moderate
Source
synthetic
A milder alternative to sodium lauryl sulfate that effectively cleanses without stripping the skin.
Irritation
low
Source
synthetic
A gentle, semi-synthetic surfactant that effectively cleanses without stripping the skin's natural moisture barrier.
Irritation
low
Source
semi-synthetic
A gentle, low-irritation surfactant that effectively cleanses while being kind to sensitive skin.
Irritation
low
Source
semi-synthetic
A gentle, non-stripping surfactant that effectively cleanses while respecting the skin barrier.
Irritation
low
Source
semi-synthetic
A gentle, non-stripping surfactant that effectively cleanses while being kind to sensitive and dry skin types.
Irritation
low
Source
semi-synthetic
A gentle, low-irritation surfactant that helps cleanse without stripping the skin's natural moisture barrier.
Irritation
low
Source
semi-synthetic
A gentle, low-irritation surfactant that cleanses without stripping the skin's natural moisture barrier.
Irritation
low
Source
synthetic
A gentle, effective surfactant that cleanses without stripping the skin barrier, making it a good choice for sensitive or dry skin.
Irritation
low
Source
semi-synthetic
A gentle, semi-synthetic surfactant that cleanses effectively while being less likely to irritate or dry out the skin compared to harsher detergents.
Irritation
low
Source
semi-synthetic
A strong foaming cleanser that effectively removes oil and dirt but can be drying or irritating for sensitive skin.
Irritation
moderate
Source
synthetic
A strong synthetic cleanser that effectively removes dirt and oil but may be drying or irritating for sensitive skin.
Irritation
moderate
Source
synthetic
A gentle chelating agent that helps maintain product stability and effectiveness by binding metal ions.
Irritation
low
Source
synthetic
A synthetic film-former that helps skincare and sunscreen stay put longer, especially in water-resistant formulas.
Irritation
low
Source
synthetic
Sodium Tungstate Antimonate is a synthetic stabilizer with limited cosmetic research and potential safety concerns; it's best avoided in leave-on products until more data is available.
Irritation
moderate
Source
synthetic
An effective cleanser with mild antimicrobial properties, best for oily or acne-prone skin but can be drying for sensitive types.
Irritation
moderate
Source
semi-synthetic
A gentle, amphoteric surfactant that cleans effectively without stripping the skin, often used in sensitive-skin and baby formulations.
Irritation
low
Source
semi-synthetic
A gentle, plant-derived surfactant that cleanses without stripping the skin, making it a great choice for sensitive or dry skin types.
Irritation
low
Source
semi-synthetic
A gentle, amino-acid-based cleanser that effectively removes dirt and oil without stripping the skin barrier.
Irritation
low
Source
semi-synthetic
Sodium urocanate is a natural skin antioxidant that may help shield skin from UV damage, but its effectiveness in finished products is still being studied.
Irritation
low
Source
natural
Sodium Ursolate is a gentle plant-derived antioxidant that may help calm skin and fight signs of aging, but research is still early.
Irritation
low
Source
natural
Sodium Usnate is a lichen-derived antimicrobial that can help control odor and surface bacteria, but it may cause irritation in sensitive skin at higher concentrations.
Irritation
moderate
Source
natural
A gentle, plant-derived surfactant that cleanses without stripping the skin, making it a good choice for sensitive or dry skin types.
Irritation
low
Source
natural
A synthetic helper that improves product feel and mixing, but can be drying for sensitive skin.
Irritation
moderate
Source
synthetic
A mild, zinc-enriched emulsifier that stabilizes formulas and may offer gentle skin-soothing benefits.
Irritation
low
Source
synthetic
A gentle, multi-tasking ingredient that may help calm skin and support barrier repair, but research is still early.
Irritation
low
Source
synthetic
A gentle, low-irritation surfactant ideal for sensitive skin and baby care, but it may not foam as richly as harsher cleansers.
Irritation
low
Source
semi-synthetic
A gentle cleansing agent that helps products foam without stripping the skin as harshly as traditional sulfates.
Irritation
low
Source
semi-synthetic
A moderate-strength surfactant that cleans effectively but may be drying for sensitive skin.
Irritation
moderate
Source
synthetic
A gentle, collagen-derived surfactant that cleans without stripping, making it a good choice for sensitive or dry skin.
Irritation
low
Source
semi-synthetic
A mild, protein-derived surfactant that cleanses without stripping and helps strengthen hair.
Irritation
low
Source
semi-synthetic
A mild, algae-derived cleansing agent that effectively removes dirt and oil while leaving a soft, non-stripped feel on skin.
Irritation
low
Source
semi-synthetic
A gentle, seaweed-based ingredient that forms a protective film on skin, helping to lock in moisture and shield against irritants.
Irritation
low
Source
semi-synthetic
A mild, amino-acid-based surfactant that cleanses without stripping the skin, making it ideal for sensitive or dry skin types.
Irritation
low
Source
semi-synthetic
Skin conditioning
SODIUM/TEA-UNDECYLENOYL HYDROLYZED COLLAGEN
A gentle, semi-synthetic ingredient that helps condition skin and may offer mild antimicrobial benefits, but research is limited.
Irritation
low
Source
semi-synthetic
A gentle, plant-derived extract with antioxidant potential, but research on its skincare benefits is still limited.
Irritation
low
Source
natural
A gentle, antioxidant-rich orchid extract that may help soothe and protect skin, but research is still emerging.
Irritation
low
Source
natural
A gentle, antioxidant-rich fruit extract that may help calm and protect skin, though research is still early.
Irritation
low
Source
natural
A gentle botanical extract with limited research; may offer soothing and antioxidant benefits but is not a proven powerhouse.
Irritation
low
Source
natural
A gentle plant extract with soothing and antioxidant potential, though research is still emerging.
Irritation
low
Source
natural
A gentle plant extract with antioxidant potential, but research is limited and benefits are not yet well-established.
Irritation
low
Source
natural
A gentle botanical extract with traditional use for soothing skin, but modern cosmetic evidence is still emerging.
Irritation
low
Source
natural
A gentle plant extract that may help calm and hydrate skin, but research is still early.
Irritation
low
Source
natural
A gentle, plant-based extract that may help calm irritated skin and provide antioxidant protection, though research is still early.
Irritation
low
Source
natural
A gentle botanical powder that may help calm and condition the skin, but scientific evidence is limited.
Irritation
low
Source
natural
A gentle, plant-based extract that may help calm irritated skin and support hydration, though scientific evidence is still emerging.
Irritation
low
Source
natural
A surface-level collagen that temporarily smooths and plumps the look of fine lines without penetrating the skin.
Irritation
low
Source
semi-synthetic
A natural clay that helps absorb excess oil and impurities, but can be drying if overused.
Irritation
low
Source
natural
A common synthetic red dye approved for use in cosmetics, but best limited to rinse-off products to avoid potential staining or sensitivity.
Irritation
low
Source
synthetic
A synthetic yellow dye that adds color to products but offers no skincare benefits; generally safe in low concentrations.
Irritation
low
Source
synthetic
Solvent Yellow 18 is a synthetic yellow dye used for coloring cosmetics, but it has limited safety data and is not commonly found in modern skincare formulations.
Irritation
low
Source
synthetic
Solvent Yellow 85 is a synthetic yellow dye used mainly in rinse-off products, but it has raised some safety concerns regarding skin sensitization.
Irritation
moderate
Source
synthetic
A gentle botanical root extract that may help calm redness and provide antioxidant protection, though human studies are limited.
Irritation
low
Source
natural
A gentle botanical extract with antioxidant potential, but research is limited and benefits are not yet well-established in human skin.
Irritation
low
Source
natural
A gentle botanical extract with antioxidant potential, but research is limited and benefits are not yet well-established in human skin.
Irritation
low
Source
natural
A gentle botanical extract that may help calm skin and fight environmental stress, though research is still emerging.
Irritation
low
Source
natural
A gentle, antioxidant-rich botanical extract that helps calm skin and defend against environmental stress, suitable for most skin types.
Irritation
low
Source
natural
A gentle, lab-grown plant extract that may help calm skin and fight free radical damage, though human studies are limited.
Irritation
low
Source
biotech