Ingredient review
Calcium Stearoyl Lactylate
INCI: Calcium Stearoyl Lactylate
A mild, food-grade emulsifier that helps blend oil and water in creams and lotions without common irritation.
In plain English
Calcium Stearoyl Lactylate is a gentle ingredient that helps oil and water mix together in skincare products, creating a smooth, creamy texture. It is made from stearic acid (a fatty acid found in cocoa butter and shea butter) and lactic acid (a natural alpha hydroxy acid). Because it is very mild, it is often used in products for sensitive 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.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Calcium Stearoyl Lactylate 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 Calcium Stearoyl Lactylate.
- 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 semi-synthetic emulsifier produced by reacting stearic acid with lactic acid and then neutralizing with calcium hydroxide. It is also commonly used in the food industry as a dough conditioner.
How it works
It reduces the surface tension between oil and water, allowing them to form a stable, uniform mixture. This prevents the product from separating and gives it a rich, creamy feel when applied to the skin.
Pros
Very gentle on skin
Calcium Stearoyl Lactylate has a low irritation risk and is often used in sensitive-skin formulations, making it a safe choice for daily moisturizers.
Stable emulsions
It helps creams and lotions stay well-mixed over time, so you don't get watery separation or a grainy texture.
Cons and cautions
Potential non-vegan source
Lactic acid can be derived from dairy, so if you follow a strict vegan routine, you may need to check the product's sourcing.
May feel heavy for oily skin
In higher concentrations, it can leave a slightly rich, occlusive feel that might not suit very oily or acne-prone skin types.
Best for
- People with sensitive or reactive skin
- Anyone looking for a gentle, stable moisturizer or cream
Use caution if
- Those seeking a completely vegan product (check source of lactic acid)
- Individuals with very oily skin who prefer lightweight gel textures
Usage tips
Safety summary
Calcium Stearoyl Lactylate is considered very safe for topical use. It has low irritation and sensitization potential, and is widely used in both food and cosmetics. No significant safety concerns have been reported.
Research notes
Research on Calcium Stearoyl Lactylate in cosmetics is limited but consistent with its safe use as a food additive. Studies confirm its low toxicity and mildness. It is well-tolerated in patch tests.
Common label clues
- Typical concentration
- 0.5–3%
- Regulatory status
- Approved as a food additive (E482) and cosmetic ingredient in the EU, US, and many other regions. No known restrictions in cosmetics.
- Common uses
- Moisturizers, Creams, Lotions, Sunscreens
- Environmental note
- Derived from renewable sources (stearic acid from plant oils, lactic acid from fermentation). Biodegradable and not considered a marine pollutant.
Good to know
- Calcium Stearoyl Lactylate is also used in baked goods as a dough conditioner, so it has a long history of safe use.
- It is considered a 'food-grade' ingredient, which adds to its safety profile.
Common questions
What is Calcium Stearoyl Lactylate in beauty products?
Calcium Stearoyl Lactylate is a gentle ingredient that helps oil and water mix together in skincare products, creating a smooth, creamy texture. It is made from stearic acid (a fatty acid found in cocoa butter and shea butter) and lactic acid (a natural alpha hydroxy acid). Because it is very mild, it is often used in products for sensitive skin.
What does Calcium Stearoyl Lactylate do in a beauty product?
It reduces the surface tension between oil and water, allowing them to form a stable, uniform mixture. This prevents the product from separating and gives it a rich, creamy feel when applied to the skin.
Is Calcium Stearoyl Lactylate safe for most people?
Calcium Stearoyl Lactylate is considered very safe for topical use. It has low irritation and sensitization potential, and is widely used in both food and cosmetics. No significant safety concerns have been reported.
Who should be careful with Calcium Stearoyl Lactylate?
Those seeking a completely vegan product (check source of lactic acid) Individuals with very oily skin who prefer lightweight gel textures
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.