Phosphoric Acid

PreservativesCAS: 7664-38-2

This is what the ingredient is.

Phosphoric acid is an inorganic acid produced synthetically for commercial use. Provides tart, tangy flavor.

Here is why it shows up on the label.

Acidulant and flavor enhancer primarily in cola beverages. Also used as pH regulator in cheese processing and as antimicrobial agent.

Here is what food agencies say.

The FDA lists it as Generally Recognized as Safe. European food agencies allow it, with ADI not specified. It is approved in the US, Europe (as E338), and Canada.

Here is what research has found.

Safety reviewed by regulatory agencies. Component of normal diet through natural sources. High intake from soft drinks associated with lower bone mineral density in some studies (American Journal of Clinical Nutrition 2006).

Here are a few things worth knowing.

Excessive consumption associated with decreased bone mineral density and increased fracture risk in some epidemiological studies. May interfere with calcium absorption. Can contribute to tooth enamel erosion in acidic beverages.

Sources

  • FDA 21 CFR 182.1073
  • Am J Clin Nutr 2006
  • Osteoporosis International 2014

How to read this page

We publish plain facts about this ingredient so a label is easier to read. This is not medical advice, and it is not a recommendation to buy, avoid, or use anything. For a personal health question, talk with a clinician who knows your history.

v1.0Updated 9/12/2026