Login or Sign up. Please use a different card. Yet they are essential macronutrients, since they fuel the brain and muscles. Part of several enzymes, one of which helps ward off a form of severe neurological damage in infants that can lead to early death. Niacin occurs naturally in food and can also be made by your body from the amino acid tryptophan, with the help of B 6. Helps make collagen, a connective tissue that knits together wounds and supports blood vessel walls.
Otherwise, Pure GCE gets my vote. Good product except the product isn't the best. I've tried a few different brands and this isn't the worst but it's not the best.