Vitamin D overdose

High daily doses of dietary vitamin D over an extended period of time can produce excessive calcium levels in the blood with symptoms of unusual thirst, metallic taste, bone pain, fatigue, sore eyes, itching skin, vomiting, diarrhea, urinary urgency, abnormal calcium deposits in blood vessel walls, liver, lungs, kidney and stomach. Vitamin D overdose also cause the build-up of calcium in the muscles which impairs their function. Doses of less than 1000 IU daily are unlikely to cause any adverse effects and prolonged exposure to sunlight does not cause toxic effects.

Vitamin D overdose can irritate the urinary tract. There may be a link between excessive vitamin D intake and heart attacks, atherosclerosis and kidney stones in people who are susceptible.

Vitamin D overdoseVery high doses of vitamin D supplements may actually increase the risk of osteoporosis. In an article published in 1997, researchers at the Cedars Sinai Medical Center in Los Angeles reported four cases of osteoporosis linked to excessive use of vitamin D supplements. Each of the four patients had high levels of calcium and vitamin D metabolites in their urine and were taking dietary supplements which contained unidentified amounts of vitamin D. When the patients stopped taking the supplements, bone mineral density increased. Vitamin D overdose for six months or longer upsets calcium balance and affects bone mineral density.

 
 
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Vitamin D overdose
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