Molybdenum: Sulfite Oxidase & Detox Pathways

Molybdenum is a trace element that serves as a cofactor for four enzymes in humans: sulfite oxidase (converts toxic sulfites to sulfates), xanthine oxidase (involved in purine metabolism and uric acid production), aldehyde oxidase (processes various aldehydes), and mitochondrial amidoxime reducing component (mARC). Of these, sulfite oxidase is the most clinically relevant.

Sulfite Sensitivity Connection

Sulfites are used as preservatives in wine, dried fruits, and many processed foods. People with insufficient sulfite oxidase activity may be more sensitive to dietary sulfites, experiencing headaches, flushing, or respiratory symptoms. While genetic molybdenum cofactor deficiency is extremely rare and severe, subclinical variations in sulfite processing may be more common.

Food Sources

Legumes (especially lentils, split peas, and black-eyed peas), grains, and nuts are the best dietary sources. Deficiency from diet alone is essentially unheard of in people eating a varied diet.

External resources: Linus Pauling Institute — Molybdenum