Lactic Acid
Type: Acidulant / pH Adjuster / Preservative
Purpose: Helps adjust acidity, stabilize formulations, and improve shelf life in certain liquid, topical, and oral medications.
Is lactic acid derived from milk?
No.
Despite the name, lactic acid is not a milk ingredient and is not derived from lactose or milk proteins.
Lactic acid is produced through fermentation of sugars (such as glucose or sucrose) or by synthetic processes. It may be manufactured using plant-based sources or microbial fermentation and does not contain dairy components.
Why the confusion?
The term “lactic” comes from the Latin lac, meaning “milk,” because lactic acid was first isolated from sour milk in the 18th century. Modern pharmaceutical lactic acid, however, is chemically produced or fermented and is not a dairy product.
Where it may appear
- Oral solutions and syrups
- Inhalation products
- Topical medications
- Injectable formulations (as a pH adjuster)
Allergy / Sensitivity Context
Some individuals with milk allergies or lactose intolerance may question lactic acid due to its name. Lactic acid itself does not contain milk proteins or lactose. As with all medication ingredients, formulation sources may vary by manufacturer.
Also Known As: 2-hydroxypropanoic acid, E270
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Understanding ingredient differences is especially important for individuals with known sensitivities. RxAllergyScan.com allows users to compare medication ingredients against their personal allergen profile.