Tag: Safe upper intake

The National Institutes of Health (NIH) states that for healthy adults aged 19 and older, the Tolerable Upper Intake Level (UL) for vitamin D is 4,000 IU (100 mcg) per day. This article explores what is the maximum daily limit of vitamin D3 and why exceeding it can be dangerous.

While it is extremely rare to get an overdose of naturally occurring folate from food, consuming excessive synthetic folic acid supplements, especially above 1mg daily, poses significant health risks. So, what happens if you have too much folate B9, particularly from supplemental sources, and what are the concerning side effects to be aware of?