The Vitamin D Blood Test (25-OH Vitamin D): Who ... anti-fracture clinical trials have used vitamin D3 at a dosage of at least 800 IU/day (20 mcg per day). Ideally, the vitamin D blood test ...

Unfortunately, it’s not unusual to have low levels of the vitamin. While there isn’t a consensus on the ideal amount of vitamin D you should have in your blood, research estimates that up to 50% of ...

it’s 20 mcg (800 IU) daily. Of course, before you pop a pill, you have to consider how much vitamin D you’re already getting from the food you eat. For instance, if you’re already getting 10 ...

Jarrow Formulas Vitamin D3 provides vitamin D3 to support a healthy immune response* Maximum Strength Vitamin D: Each softgel contains 125 mcg (5,000 IU) of vitamin D per serving, providing 625% ...

Vitamin D3, a form of vitamin D ... spend about 15 minutes in the sun at a time if you have light skin and about 25 minutes if you have darker skin. Important: Sunscreen, higher latitudes ...

800 IU (20 mcg) per day increases vitamin D blood levels 8 ng/ml (20 nmol/L). 1000 IU (25 mcg) per day increases vitamin D blood levels 10 ng/ml (25 nmol/L). 2000 IU (50 mcg) per day increases ...