Ingredient review
Stearamidodihydroxyisobutyl Stearate
INCI: STEARAMIDODIHYDROXYISOBUTYL STEARATE
A reliable synthetic emollient that softens skin and improves product feel without common irritation or clogging concerns.
In plain English
Stearamidodihydroxyisobutyl Stearate is a man-made ingredient that helps moisturizers and makeup feel smooth and silky on your skin. It works by forming a light, non-greasy film that locks in moisture and makes the product spread easily. Think of it as a helper that makes your lotion or lipstick feel nicer and keeps your skin from drying out.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Stearamidodihydroxyisobutyl Stearate is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Stearamidodihydroxyisobutyl Stearate.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A synthetic ester derived from stearic acid and isobutyl groups, designed to function as an emollient and skin-conditioning agent in cosmetic formulations.
How it works
It sits on the surface of the skin, creating a thin, breathable barrier that reduces water loss (transepidermal water loss, or TEWL) while giving the product a smooth, velvety texture. It also helps other ingredients spread evenly.
Pros
Lightweight moisture
Provides a non-greasy film that helps keep skin hydrated without feeling heavy or sticky.
Texture enhancer
Improves the feel of creams and makeup, making them glide on smoothly and evenly.
Cons and cautions
Synthetic origin
Made in a lab, which may be a turn-off for fans of natural or plant-based skincare.
Limited data
There isn't a large body of independent research on this specific ingredient, so long-term effects are less documented.
Best for
- People with normal to dry skin looking for lightweight moisture
- Anyone who wants a silky texture in their makeup or skincare
Use caution if
- Those who strictly avoid synthetic ingredients
Usage tips
Safety summary
Considered safe for topical use in cosmetics. Low irritation and comedogenic scores make it suitable for most skin types, including sensitive skin. No significant safety concerns have been reported in regulatory reviews.
Research notes
Evidence is based on industry safety assessments and formulation studies. No major clinical trials exist, but it has a long history of safe use in cosmetics.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US (FDA) and EU (CosIng) with no known restrictions at typical concentrations.
- Common uses
- Moisturizers, Lipsticks, Foundations, Eye shadows, Hair conditioners
- Environmental note
- As a synthetic compound, its biodegradability is not well-documented; however, it is used in low concentrations.
Good to know
- It is often used in combination with other emollients to balance texture.
- The name is long, but it's a common ingredient in many mainstream cosmetics.
Common questions
What is Stearamidodihydroxyisobutyl Stearate in beauty products?
Stearamidodihydroxyisobutyl Stearate is a man-made ingredient that helps moisturizers and makeup feel smooth and silky on your skin. It works by forming a light, non-greasy film that locks in moisture and makes the product spread easily. Think of it as a helper that makes your lotion or lipstick feel nicer and keeps your skin from drying out.
What does Stearamidodihydroxyisobutyl Stearate do in a beauty product?
It sits on the surface of the skin, creating a thin, breathable barrier that reduces water loss (transepidermal water loss, or TEWL) while giving the product a smooth, velvety texture. It also helps other ingredients spread evenly.
Is Stearamidodihydroxyisobutyl Stearate safe for most people?
Considered safe for topical use in cosmetics. Low irritation and comedogenic scores make it suitable for most skin types, including sensitive skin. No significant safety concerns have been reported in regulatory reviews.
Who should be careful with Stearamidodihydroxyisobutyl Stearate?
Those who strictly avoid synthetic ingredients
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.