Increases

It’s common for PCPs to recommend between 1,000 to 2,000 IUs per day of vitamin D3, Stadler said. Holick thinks adults should be on a higher amount than this, though. “Typically, I recommend adults should be on minimum 2,000 units per day — and most I recommend 5,000 units a day because you want to get your blood level, in my opinion, of [vitamin D] between 40 and 60 ng/mL, [but] up to 100…