What it is
Vinegar is a fermented dilute solution of acetic acid. In cosmetics it is used in small amounts to help adjust a formula's pH or as a traditional toning component, contributing a mild acidity.
Safety & warnings
In finished products it is used diluted; undiluted vinegar is acidic and can irritate, so concentration matters.
Origin & sourcing
Produced by fermentation of plant-derived alcohols.
History
Vinegar has a long history of traditional use on skin and hair.
Questions everyone asks
What does vinegar do in skincare?
It is used in small amounts to adjust pH or as a traditional mild toning ingredient.
Is it safe on skin?
In properly formulated products it is diluted; concentrated vinegar can irritate.