d.velop vitamin d supplements 2400 iu, 20 mcg – high potency vitamin d3 for immune support, bone & heart health – 3x faster & more effective - clinically tested - vitamin d pills, 60 count d.velop *these statements have not been evaluated by the food and drug administration. this product is not intended to diagnose, treat, cure, or prevent any disease. *clinical studies have shown that ampli-d can achieve optimal vitamin d status (30 ng/ml) on average 3x faster, and is 3x more effective, compared to the same mcg amount of conventional vitamin d3. source: quesada-gomez and bouillon (2018) osteoporos. int. 29, 1697-1711.