Fermentation-derived / single-cell protein ingredients (precision-fermented, cultured, yeast-biomass proteins) — HMTc Standard — page updateshttps://heavymetalcertified.com/standards/pet-food-fermentation-derived-proteinPublished revisions of this Heavy Metal Certified page.Fermentation-derived / single-cell protein ingredients (precision-fermented, cultured, yeast-biomass proteins) — HMTc Standardhttps://heavymetalcertified.com/standards/pet-food-fermentation-derived-proteinhttps://heavymetalcertified.com/standards/pet-food-fermentation-derived-protein#revision-57c91108888333c3Fri, 02 Oct 2026 21:00:41 GMTThe Heavy Metal Tested & Certified human-grade standard for precision-fermented, cultured, and single-cell / yeast-biomass protein ingredients used in pet food, stated as sold on a dry powder basis. Pet food is legally feed; HMTc voluntarily certifies each analyte to the strictest human-food sovereign maximum for the nearest analog, with the laxer feed-law floor disclosed for contrast.