Vitamin D Deficiency - how long before Vitamin d starts taking effect I have been on d2 50,000 units

Two to Four weeks

I was just prescribed 50,000 units a week for 6wks with a D level of 25. Are these prescription D's extended release or , boom; there it is? I read on WEB MD where anything over 10,000 can be toxic. Any thoughts?

alligator; Steven is correct but if your in the USA the D3 is the one you want to take and you have to get it from the doctor doing your blood work and don't take more, This is a special oil base medication that is why you only take one a month or twice a month and it should kick in helping you with the pain and wait until you see the doctor and get another blood test to check your D level the d2 is otc and not as effective for this problem this D3 is prescription and the base is what makes it much more toxic than the one you can buy over the counter and stays in your system which is why they need to redo a blood test after you have had it in your system for at least a month or two but you should notice some relief by then don't take more than what the doctor has prescribed.

Vitamin D3 cholecalciferol is far more effective than vitamin D2 for vitamin D levels. I take 1-2000 IU/day, as well, I also take a 100,000IU dose periodically. I have to take them, I think, to try and slow calcium loss (50 YO male with severe osteporosis). I don't notice anything.

You can safely take 2.5 -5.0mg of Folate/Folic acid (or its far more expensive metabolite). High amount folate tabs you get OTC here (very cheap): just say you have taken them before for a chronic folate deficiency. They are safe as any excess is excreted in urine. (I take this, 5mg/day) as it prevents leg pain and any peripheral neuropathy. If these levels fall too far, in me, I know all about it.