HER2 Support Group Forums - View Single Post

heblaj01 · 10-19-2006, 01:00 PM

When supplementing with vitamin D pills for any reason, check that the pills (or liquid) contains preferably vitamin D3 (cholecalciferol) instead of vitamin D2 (ergocalciferol) which has to be converted in the body into D3 the active form.
So taking D2 is likely to result in less bioavailable D3,
D2 is often used in fortified processed foods like milk.

D3 is the form used in medical studies. Since D3 is fat soluble it is better absorbed as an oil containing solftgel (or with a fatty meal) compared to dry powder caplets.

10-19-2006, 01:00 PM	#4
heblaj01 Senior Member Join Date: Apr 2006 Posts: 543	Vitamin D2 versus D3 When supplementing with vitamin D pills for any reason, check that the pills (or liquid) contains preferably vitamin D3 (cholecalciferol) instead of vitamin D2 (ergocalciferol) which has to be converted in the body into D3 the active form. So taking D2 is likely to result in less bioavailable D3, D2 is often used in fortified processed foods like milk. D3 is the form used in medical studies. Since D3 is fat soluble it is better absorbed as an oil containing solftgel (or with a fatty meal) compared to dry powder caplets.