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Manganese

Trace minerals stored as mg/kg 4 shared products have a value

Requirements

Manganese requirements for horses are not well established; forage usually supplies enough [1]. In the survey cited by the MSD Veterinary Manual, grass forage averaged 90.8 ppm manganese [1].

Reading it on a label

Trace minerals are reported in parts per million (ppm), which is mg per kg [2].

See also mineral ratios.

Sources

  1. 1. Liburt NR (peer reviewed by Boyle AG). Nutritional Requirements of Horses and Other Equids. MSD Veterinary Manual, Professional Version. Merck & Co., Inc., Rahway, NJ. Last full review February 2026. https://www.msdvetmanual.com/management-and-nutrition/nutrition-horses/nutritional-requirements-of-horses (accessed 2026-11-07)
  2. 2. A&L Canada Laboratories. Defining Analytical Constituents in Equine Feed Reports. Fact Sheet No. 234. London, Ontario. Revised February 2022. https://alcanada.com/Tech_Bulletins/Field_Crops/Forages/234-Defining%20Analytical%20Constituents%20in%20Equine%20Feed%20Report.pdf (accessed 2026-11-07)

Last edited 7 Nov 2026, 1:48 am