Vitamin B3 (Niacin)

Good sources: meats, liver, nuts, whole and enriched grains. Some niacin can be synthesized from tryptophan (inefficient). DRI: 12-16 mg/d Functions: Co-enzyme formation (NAD+ and NADP), fatty acid metabolism, and decrease serum cholesterol. It is the most potent agent to increase serum HDL at doses 100 times the RDA (but many people can’t tolerate the [...]