1.32.6-Pounds XBL Powder promotes healthy capillary strength. XBL Powder is a supplement for horses in heavy training and racing. Depending on the test methods used, over 90% of performance horses show signs of EIPH (Exercise Induced Pulmonary Hemorrhage). Ascorbic Acid has been shown to increase capillary strength. Lecithin helps maintain cell membrane structure. Vitamin K is part of one of 7 critical steps in the “Coagulation Cascade”.