Taking Too Much Vitamin D Can Backfire, Scientists Warn

 https://www.sciencealert.com/taking-too-much-vitamin-d-can-backfire-scientists-warn

The "sunshine vitamin" may come with a dark side. Just as a lack of vitamin D can lead to health dangers, so too can an excess.

For years now, scientists have warned that not everyone needs to take vitamin D supplements, and that, in rare cases, high-dose versions can be toxic, especially for young kids and older adults.