Yes it is true however there are different chemical compositions. D3 is what our bodies need and is made in our skin when exposed to ultraviolet rays after a certain amount of time. That is as I understand it anyway
D3 is a much more absorbable form. It is better to use the D3.
Vitamin D comes in both Rx and OTC varieties. The single ingredient supplement found OTC is D3-cholecalciferol-and the comparable Rx supplement is D2-ergocalciferol. No matter which OTC brand you may choose, it will always be D3. This is also the compound for which our cells have a greater affinity, therefore we can take lower doses to raise our 25(OH)D levels. D3 is naturally derived from animal sources, while D2 is a synthetic analog.
For a more in depth explaination, please look to sites like vitamindcouncil.org.
Hope this helps some!
OK, thanks folks.
Jen....I hate to admit it...but your response kinda confuses me.
How do I know if I got Rx or OTC varieties?
The bottle I bought just says D, would this be D2? Or D3? Or is there just a D?
I'm sorry, I just don't get it. I think next time I'll buy a bottle labled D3...I guess....
bump please, I wanna know.......
Check the ingredients (fine print). It should say cholecalciferol as the ingredient. This the D3 version that you want.