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Ingredient · Vitamin Mineral

Menadione Sodium Bisulfite (Synthetic Vitamin K3)

Mixed · 4/10, higher is cleaner

How we reached this

Synthetic K3 used in pet foods. Banned in human supplements in most jurisdictions for hepatotoxicity at high doses; AAFCO permits in pet food.

Sources · 1

  • AAFCO Official Publication on Pet Food Additives

Also listed as

vitamin K3

Products containing this · 3

About this rating

Ratings run 1–10, higher is cleaner, and are set editorially against the sources above — see the methodology page for how an ingredient rating becomes part of a product score. Last reviewed 2026-05-23.