Here’s why the best test for niacin status is HDRI’s NADH/NADPH, how to use it to calculate the niacin number, and what numbers you should be aiming for.

Here’s a massive 2-part podcast series I did on niacin with Alex Leaf, which has 52 scientific references:

Here are other recent episodes on niacin:

The Best Form of Niacin for Anti-Aging