Threonine plays an essential role in digestion and nutrient absorption. Up to 90% of the threonine we consume through nutrition is absorbed and utilized by intestinal tissues.
A major component of the intestinal lining is mucin, a protective protein that is largely made up of threonine. Mucin forms a protective barrier in the gut, which is vital for maintaining a healthy digestive tract. If the body lacks sufficient threonine, it prioritizes mucin production - potentially leaving too little available for other important functions such as muscle growth or overall protein synthesis.
Horses suffering from digestive issues may benefit from threonine supplementation, as it helps reinforce intestinal integrity and improve nutrient absorption.
According to the NRC, a 500 kg horse at rest requires approximately 17 grams of threonine per day for optimal protein synthesis. This requirement increases during recovery phases in performance horses. Depending on workload, they may need 19 to 22 grams per day. Young, growing horses also have an elevated need for threonine.
