The letters HPUS indicate ingredients listed in the Homeopathic Pharmacopoeia of the United States

but not this browband headstall

no milk withholding

making it ideal for horses with sensitive skin

fast fit bottle attachments protect the bottle

Finish Line 100% Pure Vitamin C Powder for Horses RX-vaccine The letters HPUS indicate ingredientsFinish Line 100% Pure Vitamin C Powder, 1 lb Vitamin C Pure is a 100% pure, all natural Ascorbic acid. Vitamin C combats free radical damage caused by oxidation or inflammation. Signs of vitamin C deficiency can be a poor coat, depressed immune system and the slow healing of wounds. 1 lb (32 day supply). 28,350 mg of Vitamin C per oz.