What it does
Lysine is one of the essential amino acids for horses, with methionine and threonine [1]. The requirements of growing horses are expressed partly as lysine per unit of digestible energy [1].
Sources
Lucerne (alfalfa) and soybean products have a better amino acid balance than cereal grains, especially maize, or most grass hays [1].
See also crude protein, methionine, threonine.
Sources
- 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)
Last edited 7 Nov 2026, 1:48 am