Vitamin B may be useful in giving the horse for the fur (spring and autumn) as well as in situations that may be stressful to the horse, for example. at competition. B-plus contains both B1, B2 (riboflavin), B6 and B12 vitamins. It also contains folic acid (B9), pantothenic acid (B5) and Niacin (B3). Since B-plus contains glycerin, many horses seems to think it is tasty too!