US lawFederal (United States)RegulationsTitle 21 CFR — Food and DrugsChapter I — FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICESPart 573 — FOOD ADDITIVES PERMITTED IN FEED AND DRINKING WATER OF ANIMALSSubpart B — Food Additive Listing573.58021 C.F.R. § 573.580Iron-choline citrate complex.Last amended: 2016Year: 2026Length: 28 wordsOfficial source Cite as 21 C.F.R. § 573.580 (2026)Iron-choline citrate complex made by reacting approximately equimolecular quantities of ferric hydroxide, choline, and citric acid may be safely used as a source of iron in animal feed.Previous21 C.F.R. § 573.560Next21 C.F.R. § 573.587