How much is enough vitamin D3?
The recommended daily intake (or RDI) of vitamin D3 for adults and children older than four years is only 20 mcg. But this will only keep you from not getting enough vitamin D to function.
We recommend that adults get between 125 mcg and 200 mcg of vitamin D3 every day. If your multivitamin is already delivering between 25-75 mcg of vitamin D, a stand-alone supplement like this one is the perfect pairing.
If you don’t know how much vitamin D3 you should take (or you’re concerned you’re not getting enough), there’s a blood test called a 25-hydroxy vitamin D blood test. Make sure to review the results with your medical advisor.