propionic acid
Propionic acid is a mold inhibitor found in soft-moist foods and baked treats. What it does, and how Bowlmark treats it.
Also appears on labels as: propionic acid (a preservative) · e280
What it is
Propionic acid is an organic acid used to prevent mold growth, listed as propionic acid or E280 — chemically the parent of calcium propionate. Small amounts of it also occur naturally, produced by gut bacteria during fiber fermentation.
Why it's in pet food
Anywhere moisture lingers — semi-moist kibble, baked or filled treats — a mold inhibitor is cheap insurance against a genuinely dangerous failure mode. Mold toxins, not the inhibitor, are the risk worth worrying about.
How Bowlmark scores it
Scores are deterministic math over the printed label — the rules below apply to every product identically, and nothing estimates or fills in a blank.
Propionic acid carries no deduction on the additive pillar. Flags are reserved for the synthetic antioxidants with documented safety questions — BHA, BHT, and ethoxyquin; mold inhibitors do a different, safety-positive job.
Foods that list propionic acid
No food on the shelf lists propionic acid yet. Scan a bag that does and its label joins the catalog — versioned from the day it arrives.
Sources
Related ingredients
Further reading
Cite this page
Bowlmark. "Propionic acid in pet food — what it is and how it scores." https://www.bowlmark.com/ingredient/propionic-acid
- Engine
- Methodology engine v1.1.0 · config 13c99e2f
- Verified
- Last verified August 9, 2026
No stored score to stamp yet — the engine and config above are the ones a scan runs today.