According to one older review, many experts agree that at least 1,000 IU (25 mcg) of vitamin D3 daily is needed in situations where there is no exposure to sunlight. Because vitamin D is fat ...

Vitamin D3 supplementation was associated with antihypertensive effects without significant between-dose differences among ...

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 ...

If you’ve discovered you have a deficiency in vitamin D, you’re not alone. It’s particularly common among: people who get limited sun exposure people with dark skin people over 65 years old ...

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 ...