Acid
What the research shows
Not enough
published research on this page yet
Covers the group as a whole. Each one has its own page.
What research says
Found in some samples or products
These come from where it was grown, how it was processed or cooked, or what it was made into. They are not about the ingredient itself, so the signal does not count them.
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Tooth enamel erosion3
Many sugar-free sweets contain food acids that wore away tooth enamel in lab tests, even some labelled tooth-friendly.
The signal at the top counts the findings in people and in animal and lab studies. A concern in studies of people outranks animal and lab studies, and “No concerns” needs at least one finding in people. When most findings in people point one way, the page leans that way (“Mostly”), and every finding is still shown. Findings whose study type is not stated are shown but not counted. This page is a reference, not medical advice. It describes what regulators and published research say. Talk to a doctor or dietitian about your own diet.
Products
The 6 most-scanned of 8,213 products on Open Food Facts that list acid.
- Cocacola original 500 Coca-Cola · 1 l 3 additives
- Cappy PULPY Coca cola · 1 L 9 additives
- Coke Zero Coca-Cola · 330 ml 5 additives
- Coke Original Taste Coca-Cola · 33 cl 2 additives
- Coca Cola Original taste Coca-Cola · 1.5 l 2 additives
- Coca-Cola Zero Azúcar Coca-Cola · 330 ml 4 additives
References
- 1Acid: ingredient taxonomy entry. Open Food Facts.
- 2Acidulant. Wikipedia. Accessed September 30, 2026. CC BY-SA 4.0.
- 3Shen P, Walker GD, Yuan Y, Reynolds C, Stacey MA, Reynolds EC. Food acid content and erosive potential of sugar-free confections. Aust Dent J. 2017;62(2):215-222. doi:10.1111/adj.12498