Consumer group finds many vitamin D supplements are over-dosed

Vitamin D supplements are often too highly dosed, according to a consumer protection group's test. High doses can accumulate in the body and lead to serious health issues, including kidney failure. A test of 22 products found most were over-dosed, with only two deemed appropriately dosed based on expert recommendations. Vitamin D is fat-soluble and stored in the body, so excessive intake is not excreted. The consumer group advises consulting a doctor for testing before taking supplements, as insurance coverage for tests is now limited to specific risk groups.