Vitamin D is toxic (and ultimately fatal) at high doses, which is why the 'suggested' dosages of between 400IU and 1000IU are so conservative. You may need more, but you should get a blood test.
THIS. And not just for Vitamin D. Not everyone absorbs / metabolizes / excretes vitamins or minerals in the same way. Learning whether or not you're an outlier can be done either the safe way, or the dangerous way.
THIS. And not just for Vitamin D. Not everyone absorbs / metabolizes / excretes vitamins or minerals in the same way. Learning whether or not you're an outlier can be done either the safe way, or the dangerous way.