What does the science say about Vit. D3?
D2 vs. D3 - D3 is a more potent form of vitamin D.
What does the science say about this product?
Research indicates that, compared to D2 (ergocalciferol), D3 is a more potent form of vitamin D. It is better able to raise serum 25(OH)D levels — the best measure of your body’s vitamin D status.