Vitamin B17 WHAT IS VITAMIN B17? You would be forgiven for doing a double-take upon seeing the term “Vitamin B-17”, especially when you consider that it’s generally accepted that there are eight B vitamins, collectively called B complex vitamins. These are thiamine (B1), riboflavin (B2), niacin (B3), pantothenic acid (B5), pyridoxine (B6), biotin (B7), folate (B9), and cobalamin (B12). https://www.nationalnutrition.ca/vitamin-b/single-b-vitamins/b17.html #vitaminb17supplement