Not to mention, it’s relatively affordable. One tablet has 2,000 IU of vitamin D3, and while recommendations vary on how much vitamin D is needed to maintain adequate blood levels, the Endocrine ...
1000 IU (25 mcg) per day increases vitamin D blood levels 10 ng/ml (25 nmol/L). 2000 IU (50 mcg) per day increases vitamin D blood levels 20 ng/ml (50 nmol/L). If the vitamin D blood test was 30 ...