Sarfraz Zaidi MD wrote a book "Power Of Vitmin D" and it has great information and studies on Vitamin D. The key to Vitamin D is to know how much is currently in your body. You do this through a blood test and it needs to be in the 50-60 range...so the Osage you should are is dependent on that. I take 10,000 IU's and a Super K every day...have for years...started at about 27 and am now at about 57. This book has great information...definitely worth it to learn all you can about D...
Sarfraz Zaidi MD wrote a book "Power Of Vitmin D" and it has great information and studies on Vitamin D. The key to Vitamin D is to know how much is currently in your body. You do this through a blood test and it needs to be in the 50-60 range...so the Osage you should are is dependent on that. I take 10,000 IU's and a Super K every day...have for years...started at about 27 and am now at about 57. This book has great information...definitely worth it to learn all you can about D...