While vitamin A offers many benefits, too much can be dangerous ... In the short term, taking a single large dose — over 200,000 micrograms — can cause nausea, vomiting, vertigo and blurry ...

In American children, “the potential benefit is likely moderate,” Russo ... and a major reason why experts don’t recommend taking a vitamin A supplement without consulting a health care ...

There's no risk in taking them at the same time, either, though. “As of now, there’s no evidence that magnesium and vitamin D ...

Blackcurrant seed oil (which is found in the supplements) contains GLA; that's an omega-6 fatty acid that the body converts ...

Cod liver oil is rich in important nutrients, but the supplements have potential risks. Experts discuss the benefits, side ...