Oleth-30 is a gentle emulsifier that helps water and oil mix in your skincare products, but it may be too heavy for very oily skin types.
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
Oleth-30 is a gentle emulsifier that helps water and oil mix in your skincare products, but it may be too heavy for very oily skin types.
Irritation
low
Source
synthetic
Oleth-35 is a gentle synthetic emulsifier that helps mix oil and water in products, but it may be less common in natural-focused formulations.
Irritation
low
Source
synthetic
A gentle surfactant and emulsifier that helps cleanse and stabilize formulas without stripping the skin.
Irritation
low
Source
semi-synthetic
Oleth-40 is a workhorse emulsifier that helps mix water and oil, but it may cause irritation for sensitive skin at higher concentrations.
Irritation
moderate
Source
synthetic
Oleth-44 is a gentle synthetic emulsifier that helps mix water and oil in creams and cleansers, with a low risk of irritation.
Irritation
low
Source
synthetic
Oleth-45 is a gentle synthetic emulsifier that helps mix water and oil in creams and lotions, with a low risk of irritation.
Irritation
low
Source
synthetic
Oleth-5 helps mix oil and water in your products, but it can be mildly irritating or pore-clogging for some skin types.
Irritation
moderate
Source
synthetic
Oleth-5 Phosphate is a gentle emulsifier that helps mix oil and water in products, with low irritation potential and a good safety profile for most skin types.
Irritation
low
Source
semi-synthetic
Oleth-50 is a synthetic emulsifier that helps blend oil and water in formulas, but it may cause irritation for sensitive skin at higher concentrations.
Irritation
moderate
Source
synthetic
Oleth-6 is a workhorse emulsifier that helps mix oil and water, but it may be mildly irritating or pore-clogging for sensitive or acne-prone skin.
Irritation
moderate
Source
synthetic
A gentle, effective cleansing ingredient that helps remove dirt and oil without stripping the skin's natural moisture barrier.
Irritation
low
Source
semi-synthetic
Oleth-7 is a workhorse emulsifier that helps mix water and oil, but it may be slightly irritating or clog pores for some skin types.
Irritation
moderate
Source
synthetic
Oleth-8 helps mix water and oil in products, but it may be mildly irritating or pore-clogging for some skin types.
Irritation
moderate
Source
synthetic
Oleth-82 is a synthetic emulsifier that helps mix oil and water in cleansers, but it may be slightly drying or irritating for very sensitive skin.
Irritation
moderate
Source
synthetic
Oleth-9 is a reliable emulsifier that helps create stable, creamy textures, but it may not suit those with very sensitive skin.
Irritation
low
Source
synthetic
A powerful olive-derived antioxidant that helps protect skin from environmental damage and supports a more even, youthful complexion.
Irritation
low
Source
natural
A gentle antioxidant from olive leaves that helps protect skin from environmental stress and may calm irritation.
Irritation
low
Source
natural
Oleyl Acetate is a lightweight emollient that softens skin but may clog pores for acne-prone individuals.
Irritation
low
Source
synthetic
A mild, amino-acid-derived ingredient that conditions skin without irritation, making it a good choice for sensitive or dry skin types.
Irritation
low
Source
semi-synthetic
A gentle fatty alcohol that softens skin and thickens formulas, but may clog pores for some.
Irritation
low
Source
natural
A gentle wax ester that softens skin and improves product feel without common irritation.
Irritation
low
Source
semi-synthetic
A gentle, low-irritation surfactant that cleans without stripping the skin or hair.
Irritation
low
Source
semi-synthetic
A synthetic conditioning ingredient that helps reduce static and soften hair, but is not a primary moisturizer for skin.
Irritation
low
Source
synthetic
Oleyl Erucate is a gentle emollient that helps soften and smooth skin, but it's not a standout active ingredient.
Irritation
low
Source
synthetic
A gentle, phosphate-based surfactant that cleanses effectively while being kind to sensitive skin.
Irritation
low
Source
semi-synthetic
A gentle emollient that helps soften skin and stabilize formulas without clogging pores or causing irritation.
Irritation
low
Source
semi-synthetic
A synthetic antistatic agent that helps soften hair and reduce flyaways, but may be irritating for sensitive scalps or acne-prone skin.
Irritation
moderate
Source
synthetic
Oleyl lactate is a gentle, non-greasy emollient that helps soften skin and improve texture without clogging pores.
Irritation
low
Source
semi-synthetic
Oleyl Lanolate is a gentle emollient that helps soften skin, but may clog pores in acne-prone individuals.
Irritation
low
Source
semi-synthetic
A gentle emollient that helps soften skin and support barrier function, with a low risk of irritation or clogged pores.
Irritation
low
Source
semi-synthetic
Oleyl Myristate is a reliable emollient that softens skin and improves product feel, but it may clog pores for acne-prone individuals.
Irritation
low
Source
semi-synthetic
Oleyl Oleate is a lightweight emollient that softens skin and helps other ingredients absorb, but it may clog pores for acne-prone individuals.
Irritation
low
Source
semi-synthetic
Oleyl Palmitamide is a gentle emollient that helps soften and condition the skin, but research on its specific benefits is still limited.
Irritation
low
Source
synthetic
Oleyl Stearate is a gentle emollient that helps soften skin and improve product texture, with a low risk of irritation or clogged pores.
Irritation
low
Source
semi-synthetic
A synthetic peptide amide that signals skin to produce more collagen, helping reduce fine lines and improve firmness with low irritation risk.
Irritation
low
Source
synthetic
A synthetic peptide that signals skin to produce more collagen, helping reduce fine lines and improve firmness with low irritation risk.
Irritation
low
Source
synthetic
A synthetic peptide that signals skin to produce more collagen, helping reduce fine lines and improve firmness with minimal irritation.
Irritation
low
Source
synthetic
A synthetic peptide that may help reduce fine lines and improve skin firmness, but more human studies are needed to confirm its effectiveness.
Irritation
low
Source
synthetic
Oligopeptide-105 is a lab-made peptide that may help firm skin and soften wrinkles, but research is still early.
Irritation
low
Source
synthetic
Oligopeptide-106 is a synthetic peptide that signals skin to produce more collagen, helping reduce fine lines and improve firmness with minimal irritation risk.
Irritation
low
Source
synthetic
A synthetic peptide that signals skin to produce more collagen, helping reduce fine lines and improve firmness with minimal irritation risk.
Irritation
low
Source
synthetic
A lab-made peptide duo that may help reduce fine lines and improve skin firmness, but results vary and it works best in a consistent routine.
Irritation
low
Source
biotech
A lab-made peptide duo that may help smooth wrinkles and improve skin firmness, though human studies are limited.
Irritation
low
Source
synthetic
A lab-made peptide that may help signal skin to produce more collagen, but research is still early and results vary.
Irritation
low
Source
synthetic
Oligopeptide-111 is a lab-made peptide that may help skin look firmer and more youthful by encouraging collagen-related activity, but human studies are limited.
Irritation
low
Source
synthetic
A synthetic peptide that may help reduce fine lines and improve skin firmness by signaling collagen production, but research is still emerging.
Irritation
low
Source
synthetic
A synthetic peptide that may help improve skin firmness and reduce fine lines, but human research is still limited.
Irritation
low
Source
synthetic
A synthetic peptide that signals skin to produce more collagen, helping reduce fine lines and improve firmness with low irritation risk.
Irritation
low
Source
synthetic
A synthetic peptide that signals skin cells to produce more collagen, helping reduce fine lines and improve firmness with consistent use.
Irritation
low
Source
synthetic
A lab-made peptide that may help support collagen and improve skin firmness, but research is still early and results vary.
Irritation
low
Source
synthetic
Oligopeptide-121 is a lab-made peptide that may help support collagen and improve skin firmness, but research is still early.
Irritation
low
Source
synthetic
A synthetic peptide that may help support collagen production and improve skin firmness, but research is still emerging.
Irritation
low
Source
synthetic
A lab-made peptide that may help support collagen and firmness, but specific research on this exact peptide is limited.
Irritation
low
Source
synthetic
A lab-made peptide duo that may help firm skin and soften lines, but research is still early.
Irritation
low
Source
synthetic
A peptide duo that may help smooth fine lines and support collagen, but results vary and more human studies are needed.
Irritation
low
Source
synthetic
A lab-made peptide amide that may help firm skin and reduce fine lines, but human research is still limited.
Irritation
low
Source
synthetic
A synthetic peptide amide that may help support collagen and improve skin firmness, but long-term human data is still limited.
Irritation
low
Source
synthetic
A synthetic peptide that may help reduce fine lines and improve skin firmness, but research is still emerging.
Irritation
low
Source
synthetic
A lab-made peptide that may help firm skin and soften wrinkles, but human studies are limited.
Irritation
low
Source
synthetic
A promising peptide duo that may help firm skin and soften lines, but long-term human data is still limited.
Irritation
low
Source
biotech