M.A.S.S. Builder is a veterinarian developed formulation designed to support optimal body condition and build lean muscle. M.A.S.S. Builder's unique amino acid blend supports feed efficiency while another component support appetite.

• The first supplement designed to support healthy weight
• Combines gamma oryzanol, l-lysine, threonine, and fenugreek
• All natural and non-steriodal formula
• Recommended by veterinarians to support healthy weight in the horse
• Helps maintain healthy body weight
• For all classes of horses