My wife is currently taking 50k of d3 once weekly. I was told by dr that was d2. DC
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 synthesized by plants and Vitamin D3 is the internal form that we make mainly through exposure to the sun.
Both Vitamin D2 and D3 can be taken as a Vitamin D supplement.
For some, cholecalciferol (D3) is the preferred type.This is because certain people in the health field believe vitamin D2 supplements are not as potent as their D3 counterparts. However, there is also research evidence to suggest that vitamin D2 is just as effective as vitamin D3. For now, the debate continues, and people must trust their own instincts when making a choice.
Ergocalciferol D2 and cholecalciferol D3 are available OTC and on a prescription.
Search for questions
Still looking for answers? Try searching for what you seek or ask your own question.
Posted 2 Mar 2011 • 1 answer
I Was told I was low in vitamin D and read that vitamin D3 is the vitamin to take. It's all confusi?
Posted 21 Oct 2011 • 4 answers
Posted 11 Aug 2015 • 3 answers
Vitamin D Deficiency - I had low levels of the vitamin D, 25 hydroxy, 9ng/mL in D3 and D, D2 was at?
Posted 10 Jun 2016 • 0 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