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Does Tryptophan Turn Into Niacin?
Yes. The body makes niacin from tryptophan: 60 mg of tryptophan counts as 1 mg of niacin.[1]
Based on NIH Office of Dietary Supplements — Niacin fact sheet · Updated October 10, 2026
Work togetherEvidence: Established
Tryptophan is made into niacin[1]
Why
The body can make niacin from tryptophan: 60 mg of tryptophan counts as 1 mg of niacin.
What the source says
Cover niacin from food if intake is short.
Source [1]Niacin: Fact Sheet for Health Professionals. NIH Office of Dietary Supplements. (ods.od.nih.gov)
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Sources
- Niacin: Fact Sheet for Health Professionals. NIH Office of Dietary Supplements. ods.od.nih.gov
This page is general information from the cited sources, not medical advice. If you take prescription medication, are pregnant, or manage a health condition, check supplement changes with a pharmacist or doctor.