KER B-QuietB QUIET has been formulated to treat the symptoms of thiamine and magnesium deficiency including hyperirritability and nervousness in horses. Thiamine plays a vital role in carbohydrate metabolism and nerve transmission. Hard working horses or those on high grain diets may have reduced production of thiamine by intestinal bacteria because of stress or hindgut acidosis. Thiamine supplementation has been shown to have a calming effect on individuals