Food supplements can be fake friends: the experience of a 54-year-old Canadian is proof of that. The man took a high-dose vitamin D supplementation that damaged his kidneys. His story is told in the Canadian Medical Association Journal.
– Mike Bryan (@functionalfood) April 8, 2019
Creatinine levels too high
The man returned from vacation in Southeast Asia, where he had spent two weeks in the sun. After a visit to his doctor, he was admitted to first aid because his blood creatinine levels were very high. This substance is naturally present in the body: measuring its speed makes it possible to check whether the functioning of the kidneys is normal.
More than 10 times the maximum recommended dose
Several tests were needed to understand the origin of the kidney problem: too much vitamin D supplementation. The 54-year-old man took it for two and a half years following a referral from a naturopath, but he did not suffer from deficiency or bone problems.
Every day he took between 8 and 12 drops, which amounts to between 8,000 and 12,000 international units (IU). The recommended daily dose is between 400 and 1000 IU per day, and between 800 and 2000 IU for those who are deficient. Such amounts of vitamin D in his body have increased the amount of calcium in the blood and in the long term, kidneys are damaged.
A year after diagnosis, the man has found normal levels of calcium and vitamin D in the blood, but he now suffers from chronic kidney disease. For the Canadian doctors who cared for this patient, the case recalls that any intake of a dietary supplement should be monitored, because if some vitamins are not dangerous or toxic in small amounts, they can become and the effects of it are irreversible.
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