Many people are saying up to 1200 units every ... pill now have 400 D in the pill. It's interesting that multi-vitamins sometimes have D2 instead of D3. What does that mean? Vitamin D2 is from ...

For individuals with severe deficiency, doctors often prescribe ergocalciferol 50,000 units (Vitamin D2) to quickly restore vitamin D levels. This high-dose treatment is typically taken once a ...