#equinemuscle

The best topline supplement for horses in 2025 will typically contain high-quality amino acids, fat sources, and digestible proteins. These nutrients support muscle development along the spine and hindquarters.

Supplements focused on topline improvement are especially useful for older horses, rescue animals, or those returning to work. When choosing one, check for ingredients like lysine, vitamin E, and rice bran — and always follow feeding instructions carefully.