Volume Prices Available. Message us here to discuss! Life Extension B3 Niacin 500 MG 100 Caps (Two Pack) Part Number:LEX-0372@2 Description Supports cell energy already-healthy cholesterol levels. Life Extension's best-selling supplement for supporting already-healthy cholesterol levels, contains niacin,which is crucial for supporting the healthy metabolism of glucose, fat and alcohol. Overview Niacin is called B3 because it was the third B vitamin to be discovered. Supplementing with niacin can help people maintain already-healthy cholesterol levels, an attribute identified in the 1950s. This makes it one of the most-studied nutrients for this purpose. No wonder Vitamin B3 Niacin is our best-selling supplement for supporting already-healthy cholesterol levels.. Niacin is a B vitamin that can help to maintain already-healthy cholesterol levels and more. Helps maintain already-healthy cholesterol levels Supports healthy metabolism of glucose, fat alcohol Promotes cellular energy production Additional Images