Which vitamin is primarily responsible for the conversion of tryptophan to niacin?

A Vitamin B6 ✓
B Vitamin B12
C Vitamin C
D Vitamin B2 (Riboflavin)

Explanation

Vitamin B6 is necessary for the conversion of tryptophan to niacin, highlighting its importance in niacin synthesis.

Source

Harper's Biochemistry
Vitamins Biochemistry Niacin Synthesis Medium MEDICAL Confidence: high