I have found differences in the units, but what I really mean is the differences in the chemistry & the indications. I know vit D helps preserve the Calcium in bones, but what other indications are for the diff types of vit D?
German researcher Adolf Windaus first discovered 3 forms of vitamin D, which he called D1, D2, and D3. It was later learned that the vitamin D1 was a mixture of compounds rather than a pure vitamin D product, so the term D1 is no longer used.
The term "Vitamin D" now refers to several different forms.
The two forms important in humans are : ergocalciferol (vitamin D2) and cholecalciferol (vitamin D3). Vitamin D2 is a synthetic form (man made) and Vitamin D3 is the internal form that we make.
See: http://www.nlm.nih.gov/medlineplus/druginfo/natural/patient-vitamind.html - see notes under dosing for uses of different forms of vitamin D.
Search for questions
Still looking for answers? Try searching for what you seek or ask your own question.
Vitamin D Deficiency - My vitamin d test came back with a reading of <4, my doctor wants me to take?
Posted 11 Nov 2009 • 2 answers
Posted 19 Jan 2011 • 1 answer
Posted 7 May 2011 • 1 answer
Posted 19 Oct 2011 • 5 answers
Vitamin D Insufficiency - I've been prescribed pro d3 20000u two caps weekly as directed by my gp is
Posted 15 Aug 2016 • 0 answers