Tag: Vitamin d health

According to the NIH, for every 1,000 IU of daily vitamin D3 supplementation, blood levels of 25(OH)D are expected to increase by approximately 10 ng/mL after a few weeks. However, this rate can vary significantly based on individual factors, making the question of how much does vitamin D increase with supplements a complex one. This article explores the typical increases, influencing factors, and best practices for optimizing your vitamin D levels.

According to the National Institutes of Health, the Tolerable Upper Intake Level (UL) for vitamin D is 100 mcg (4,000 IU) per day for adults. This means that taking 25 mcg of vitamin D, which is equivalent to 1,000 IU, is generally considered a safe and moderate daily dose for most healthy adults and well below the established upper limit.