Supplement analysis backed by scientific evidence · PT

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Limited evidenceVitamins & minerals

Molybdenum

Molybdenum is genuinely essential — it is the cofactor for sulfite oxidase and two other enzymes — but dietary deficiency essentially does not occur outside long-term parenteral nutrition. Supplementing it in healthy people has no demonstrated benefit.

What the science says

  • Essential enzyme cofactor Strong evidence

    Molybdenum, as molybdopterin, is required by sulfite oxidase, xanthine oxidase and aldehyde oxidase. Its essentiality is beyond dispute: inherited molybdenum cofactor deficiency causes severe neonatal neurological disease, and acquired deficiency has been documented in a patient on prolonged molybdenum-free parenteral nutrition, producing tachycardia, headache and sulfur amino acid intolerance that reversed with repletion.

  • Benefit from supplementation in healthy adults Limited evidence

    Nutrition reviews consistently find typical Western intakes of roughly 75-250 mcg/day, comfortably above the 45 mcg/day RDA, with no population evidence of inadequacy. No randomized controlled trial has shown any health outcome improved by molybdenum supplements in people eating an ordinary diet.

  • Sulfite sensitivity, "detox" and candida claims Limited evidence

    Molybdenum is marketed for sulfite intolerance, wine headaches, and yeast "die-off" symptoms on the grounds that sulfite oxidase needs it. The biochemistry is real; the clinical claim is not tested. There are no controlled trials in sulfite-sensitive people, and sulfite oxidase is not molybdenum-limited at normal intakes.

Dosage & safety

Studied doseThe adult RDA is 45 mcg/day (50 mcg in pregnancy and lactation); the tolerable upper intake level is 2,000 mcg/day. Clinical nutrition guidelines for parenteral nutrition use only microgram-range amounts (roughly 20 mcg/day for adults). Consumer supplements commonly supply 50-500 mcg — far more than needed and with no demonstrated advantage. Food sources are far more than adequate: legumes, grains, nuts and organ meats.
SafetyVery low toxicity at dietary intakes. High chronic intakes have been associated with elevated uric acid and gout-like joint symptoms in observational reports from high-molybdenum regions. The most concrete concern is copper: molybdenum in excess forms thiomolybdates that block copper absorption and mobilize tissue copper — this is exactly how ammonium tetrathiomolybdate is used therapeutically in Wilson's disease — so sustained high-dose molybdenum can induce functional copper deficiency (anemia, neutropenia, neuropathy). Stay well below the 2,000 mcg/day upper limit; there is rarely a reason to supplement at all. Caution in renal impairment, where excretion is reduced.

Scientific references

Where to buy

Swanson Vitamins, Albion® Molybdenum, 400 mcg, 60 Veggie Caps

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