Vitamin B3, also called nictotinic acid, niacin or Inositol hexaniacinate, is a water-soluble vitamin that belongs to the vitamin B complex. Vitamin B3 is not stored in the body and must be made sufficiently available on a daily basis through a high-quality diet or through supplementation. But the body can also produce vitamin B3 itself using vitamins B1, B2 and B6 from the amino acid tryptophan, provided that these are sufficiently available.
Vitamin B1, also called thiamine, is a water-soluble vitamin that belongs to the vitamin B complex. Vitamin B1 is not stored in the body and must be made sufficiently available on a daily basis through a high-quality diet or through supplementation.