Researchers from the University of Surrey in the UK found that taking vitamin D2 can cause reduced levels of vitamin D3 in ...

Researchers analyzed 11 trials with 655 adults and discovered that taking vitamin D2 supplements decreases the body's vitamin ...

Since vitamin D accumulates in the body, taking a high-dose supplement may lead to vitamin D toxicity. This causes nausea, vomiting, and weakness.

In excess, iron supplements can cause short-term side effects like fainting or hives. In the long-term, they may cause heart ...

Taking iron supplements every day can be beneficial for those with iron deficiency, but excessive or prolonged use may lead ...

When diet and absorption is insufficient, iron supplements act as a safety net. While iron supplements are effective in dealing with deficiencies, in some cases, they can also cause side effects and ...