Originally Posted by Hutchinson

Vitamin D2 Is Much Less Effective than Vitamin D3 in Humans
The case against ergocalciferol (vitamin D2) as a vitamin supplement

50,000iu Biotech Pharmacal Cholecalciferol is readily available and as it's form humans use will correct status faster, more reliably for less cost and is safer. By using cholecalciferol you end the potential problems surrounding the need to convert from D2 to D3 before the active vitamin D hormones calcidiol/calcitriol production.

The point of showing the six most common nutrient deficiencies that are most likely following particular weight loss plans was to focus attention on the most likely deficiencies.
Obviously you should select from that list those you consider most relevant in your particular case.

The fact you are taking prescription vitamin D and not the human form is not evidence you are vitamin D replete or your body is able to use the form of vitamin D2 prescribed. The sooner you change to the human form the better.