Acute toxicity of molybdenum (Mo), the metal in question, has not been seen in humans, and the toxicity depends strongly on the chemical state. Studies on rats

Acute toxicity of molybdenum (Mo), the metal in question, has not been seen in humans, and the toxicity depends strongly on the chemical state. Studies on rats show a median lethal dose (LD50) as low as 180 mg/kg for some Mo compounds. Although human toxicity data is unavailable, animal studies have shown that chronic ingestion of more than 10 mg/day of molybdenum can cause diarrhea, growth retardation, infertility, low birth weight, and gout; it can also affect the lungs, kidneys, and liver