For adults, a level of vitamin D in the blood of 20 nanograms per milliliter (ng/mL) or above is generally considered adequate. Levels below 20 ng/mL are generally too low for adequate bone health ...

The author of a 2016 review suggests that normal levels are more likely to fall between 0.5 to 2.5 milli-international units (mIU) per milliliter (mL). Sex and gender exist on spectrums.

New satellite images show what could be North Korea’s biggest warship ever – possibly more than double the size of anything in leader Kim Jong Un’s naval fleet. Images taken by independent ...