How much vitamin D to supplement?

In discussing vitamin D supplementation, Rhndonda Patrick emphasizes the importance of individual testing to determine the appropriate dose. A general safe range for daily supplementation is between 1,000 to 5,000 International Units (IU). However, she notes that it's crucial to get vitamin D levels tested, as individual requirements can vary greatly due to factors like genetic differences in vitamin D metabolism 1.

Furthermore, she points out that while the upper safe limit set by the Institute of Medicine is 4,000 IU daily, she personally takes 5,000 IU, which helps maintain her levels around 50 nanograms per milliliter 1. Nonetheless, she highlights that excessive intake, such as 100,000 IU per day, can potentially lead to toxicity, although this is relatively rare and difficult to achieve with standard doses 2.

For most people, supplementing within the range of 1,000 to 5,000 IU should be safe, but personal health factors and medical consultation should guide exact dosages. Regular blood tests are recommended to monitor and adjust the dosage as necessary.