B-Quiet Paste is a magnesium and thiamine supplement intended for horses of all ages. This nutrient-enriched paste is suitable for all classes of horses for use before and during competition. B-Quiet Paste provides concentrated levels of thiamine, an essential B vitamin, and magnesium. In hard-working horses or those on high-grain diets, production of thiamine by intestinal bacteria may be reduced because of stress and hindgut acidosis.