Lactic acid

Q: What does lactic acid do for your skin?

Lactic acid helps to exfoliate the skin by breaking down the bonds between dead skin cells, leading to smoother, brighter skin. It also attracts moisture to the skin, keeping it hydrated.

Q: Is lactic acid safe to use every day?

Low concentrations of lactic acid in products can be used daily, but high concentrations may lead to irritation if used too frequently. It is recommended to follow product instructions and monitor your skin’s response.

Q: Can lactic acid cause breakouts?

Lactic acid is generally well-tolerated, but can cause breakouts in some people, especially if overused or if the skin is not accustomed to its exfoliating effects. Start with lower concentrations to allow your skin to adjust.

Q: Can you use lactic acid with retinol?

Both lactic acid and retinol can be beneficial to skin, but using them together can increase the risk of irritation. It’s best to use them on alternating nights and monitor your skin’s tolerance.

CAS: 50-21-5 | Synonyms: 2-Hydroxypropanoic acid, Milk acid, AHA +2

Safer alternative: Mandelic acid

Toxicity Score

2 /10

Lower Risk

Primary Concern

Under review

Found In

Facial Cleansers, Moisturizers, Chemical Peels

Persona Risk

Medium Risk for Skin & Allergy

Put Simply

Lactic acid is used in skincare products to gently remove dead skin cells and improve your skin's texture and moisture. While it's generally safe and can leave your skin looking fresh and smooth, it might cause irritation for some people, especially if you have sensitive skin or if the product has a high concentration of it. Overall, it's a low-risk ingredient that helps give your skin a healthy glow.

Clinical Summary

Lactic acid is an alpha hydroxy acid (AHA) commonly used in skincare products for its exfoliating properties. It is generally considered safe for use in cosmetics and personal care products, though it can cause skin irritation in some individuals, especially at higher concentrations. Lactic acid is also used due to its ability to improve skin texture and moisture levels.

What This Score Means

Lower Risk. This ingredient scores 2/10. Generally considered safer, though individual sensitivities may vary. Always check with your healthcare provider for specific concerns.

Regulatory Status

Cross-referenced safety assessments from regulatory bodies

Organization

Rating

Concern

EWG

Mild skin irritation

ECHA

No hazard classification

Lactic acid is not classified as a hazardous substance.

Also Listed On Labels As

2-Hydroxypropanoic acid Milk acid AHA Lactic Propanoic acid, 2-hydroxy-

Risk by Health Profile

Skin & Allergy Medium Risk

Can cause skin irritation or redness, especially in sensitive skin or at high concentrations.

Frequently Asked Questions

What does lactic acid do for your skin?

Is lactic acid safe to use every day?

Can lactic acid cause breakouts?

Can you use lactic acid with retinol?

Sources & Citations

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