Last reviewed May 2026 · 1 min read
Is Lactic Acid vegan?
Also known as: E270, Milk acid (misnomer)
E-number: E270
Vegan
Suitable for a vegan diet.
Yes — Despite its name containing 'lactic' (which sounds like lactose/milk), commercially used lactic acid is almost exclusively produced via the bacterial fermentation of carbohydrates (cornstarch, beet sugar), making it vegan.
01 · The basics
What is Lactic Acid?
A naturally occurring organic acid used primarily as a food preservative and to impart a tart, sour flavor.
02 · The source
Where it comes from
Despite its name containing 'lactic' (which sounds like lactose/milk), commercially used lactic acid is almost exclusively produced via the bacterial fermentation of carbohydrates (cornstarch, beet sugar), making it vegan.
Frequently asked
FAQ
Does lactic acid contain dairy?
No. While it was first isolated from sour milk, the lactic acid used in food manufacturing today is made from fermenting plant sugars.
Is lactic acid safe for people with dairy allergies?
Yes, because it is derived from plant sources like corn or beets, it contains no milk proteins and is safe for those with dairy allergies.
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