Acetic Acid
A pH adjuster used at low levels. It sets the formula acidity and does not affect skin in the finished product.
Supporting ingredient
It gives a product its texture, stability or shelf life. It has no claimed effect on the skin, so an efficacy tier does not apply. What is known about its safety is below
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Normal, Dry, Combination, Oily, Sensitive
About this ingredient
Acetic acid (INCI: Acetic Acid) is the acid of vinegar, used in cosmetics at minimal doses as a pH regulator. Its function is to bring the formula's acidity to the range it needs, which keeps other ingredients and preservatives stable. In the finished product and at those concentrations, it is not felt on the skin. This is a purely functional component, not a skincare active. It provides no hydration, glow, or barrier effect; its role is only technical. The product's effectiveness is judged by its actives, not by this pH adjustment. For topical use at cosmetic doses there is no systemic risk. It can be used during pregnancy and breastfeeding. Tolerance at these low concentrations is good, with low irritation and allergy potential. In concentrated form acetic acid would be irritating, but that is not the case in a finished formula.
Frequently asked questions
Is Acetic Acid safe during pregnancy?
Acetic Acid is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Acetic Acid for?
Acetic Acid suits: normal, dry, combination, oily, sensitive.
What is Acetic Acid and what does it do in cosmetics?
A pH adjuster used at low levels.
What's the INCI name for Acetic Acid?
The INCI name is Acetic Acid.
See Acetic Acid in a product composition right on the store page
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Similar role in the formula
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