The short version
Molybdenum activates four enzymes that break down sulfur-containing amino acids and purines, a background job the body barely notices when it goes right, which is almost always.
Beans lead the list, literally
NIH's own ranking puts legumes in first place, ahead of every other food group, including meat.
Primary source 01 / 06
Legumes are the richest sources of molybdenum
Half a cup of black-eyed peas alone supplies more than six times the Daily Value, and lima beans aren't far behind. Whole grains and nuts round out the plant side of the list.
The body takes what it needs
Whatever the diet supplies, most of it gets used.
Primary source 02 / 06
Adults absorb 40% to 100% of dietary molybdenum
That is an unusually generous absorption window for a trace mineral, and it helps explain why intake shortfalls essentially don't happen.
Deficiency is close to a historical footnote
The deficiency record for molybdenum is about as thin as any nutrient on this shelf.
Primary source 03 / 06
Molybdenum deficiency has not been reported, except in people with a genetic mutation that prevents the synthesis of molybdopterin and therefore of sulfite oxidase
That genetic condition, molybdenum cofactor deficiency, is present from birth and is usually fatal within days regardless of diet. Outside of it, exactly one acquired case has ever made it into the medical literature.
Primary source 04 / 06
A single reported incident of acquired molybdenum deficiency occurred in 1981 in a patient receiving total parenteral nutrition that was devoid of molybdenum
That patient was on intravenous nutrition with no molybdenum in the formula at all, not eating a restrictive diet by choice. NIH's own risk-group review reflects how rare that scenario is.
Primary source 05 / 06
No known groups of people are likely to have inadequate molybdenum intakes.
Unlike some trace minerals, molybdenum has not attracted a supplement mythology to debunk.
Primary source 06 / 06
Molybdenum is not a standard treatment for any disease or disorder.
There is no popular claim riding on it, no picolinate-style product promising better blood sugar or faster weight loss. It is a mineral that plant foods, beans especially, already supply without anyone needing to think about it.