Finish Line’s XBL® Ultra Powder promotes a healthy circulatory system, including healthy capillary strength in the lungs. XBL Ultra is great for horses in heavy training and essential for performance horses. Folic Acid, Vitamin B12, Vitamin C (Ascorbic Acid), and Vitamin K are some of the noteworthy ingredients that help support healthy blood and capillary strength. Scoop enclosed equals 1 oz or 21 gm. Feeding directions: 1 sccop for maintenance. Note: Some horses may need to say on 2 scoops per day.