What is Horbaach Vitamin B Complex?. Horbaach Vitamin B Complex is a carefully formulated blend containing all eight essential B vitamins, along with choline. These include Vitamin B1 (Thiamine), Vitamin B2 (Riboflavin), Vitamin B3 (Niacin), Vitamin B6, Folic Acid, Vitamin B12, Biotin, and Vitamin B5 (Pantothenic Acid).