Ingredient review
Stearamide AMP
INCI: STEARAMIDE AMP
A synthetic thickener and stabilizer that improves texture but may be too heavy for oily or acne-prone skin.
In plain English
Stearamide AMP is a waxy synthetic ingredient that helps thicken lotions and conditioners, giving them a rich, silky feel. It also helps keep the oil and water parts of a formula from separating. Think of it as a texture helper that makes products feel more luxurious, but it can be a bit heavy for very oily or breakout-prone skin.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Main practical flags: irritation is low; clogging risk is moderate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- moderate
Quick decision guide
Useful, but context matters
Stearamide AMP can be useful, but watch for possible clogging concerns.
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 Stearamide AMP.
- 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
moderateMay be fine for many users but deserves caution if you are breakout-prone.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
Stearamide AMP is a synthetic amide derived from stearic acid (a fatty acid) and aminomethylpropanol. It is a waxy solid at room temperature and is used primarily as a thickener and emulsion stabilizer in personal care products.
How it works
In a cosmetic formula, Stearamide AMP increases viscosity by forming a network of waxy crystals that thicken the product. It also helps stabilize oil-in-water emulsions, preventing the oil and water phases from separating. In hair products, it can deposit a thin film on the hair shaft, adding slip and reducing frizz.
Pros
Improves product texture
Creates a rich, creamy consistency that feels luxurious and spreads easily, enhancing the user experience.
Stabilizes formulas
Helps keep oil and water mixed together, so your product stays smooth and doesn't separate over time.
Cons and cautions
Potential for clogged pores
Rated as moderately comedogenic, it may contribute to breakouts in acne-prone individuals, especially in leave-on products.
Not natural
Synthetic origin may be a turn-off for those seeking plant-based or naturally derived ingredients.
Best for
- Those who enjoy rich, creamy textures in moisturizers and conditioners
- People with dry or normal skin looking for extra emollience
Use caution if
- Individuals with oily, acne-prone skin who may find it too heavy
- Those following a strictly natural or clean beauty routine
Usage tips
Safety summary
Stearamide AMP is considered safe for use in cosmetics at typical concentrations. It has low irritation potential but moderate comedogenic risk, so it may not be ideal for acne-prone skin. No significant toxicity concerns have been reported in regulatory reviews.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel have evaluated stearamide derivatives and found them safe for use in rinse-off and leave-on products at concentrations up to 5%. However, specific studies on Stearamide AMP are limited, and most data come from related compounds.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US (FDA) and EU (CosIng) at typical concentrations. No specific restrictions.
- Common uses
- Conditioners, Hair masks, Leave-in treatments, Body washes, Lotions
- Environmental note
- As a synthetic ingredient, its biodegradability is limited compared to natural waxes. It may persist in water systems.
Good to know
- Stearamide AMP is often found in professional hair care lines for its smoothing properties.
- It is not the same as Stearamidopropylamine, though they are related compounds.
Common questions
What is Stearamide AMP in beauty products?
Stearamide AMP is a waxy synthetic ingredient that helps thicken lotions and conditioners, giving them a rich, silky feel. It also helps keep the oil and water parts of a formula from separating. Think of it as a texture helper that makes products feel more luxurious, but it can be a bit heavy for very oily or breakout-prone skin.
What does Stearamide AMP do in a beauty product?
In a cosmetic formula, Stearamide AMP increases viscosity by forming a network of waxy crystals that thicken the product. It also helps stabilize oil-in-water emulsions, preventing the oil and water phases from separating. In hair products, it can deposit a thin film on the hair shaft, adding slip and reducing frizz.
Is Stearamide AMP safe for most people?
Stearamide AMP is considered safe for use in cosmetics at typical concentrations. It has low irritation potential but moderate comedogenic risk, so it may not be ideal for acne-prone skin. No significant toxicity concerns have been reported in regulatory reviews.
Who should be careful with Stearamide AMP?
Individuals with oily, acne-prone skin who may find it too heavy Those following a strictly natural or clean beauty routine
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.