Well, Richard Carmona, MD, MPH is the former Surgeon General of the United States, and a professor of public health at the University of Arizona. He's hardly a "quack." He reported various facts, including the results of a research study that found which doses typically led to toxicity.

I conceded that blood labs can be helpful. My sister had access to a good physician, and was unable for a long time to raise her levels on 6000 IU per day. It was the sunshine this summer that finally got her enough Vitamin D to relieve the inflammation that was keeping her intestines from absorbing her dietary Vitamin D! She's most likely taking less than 6000 IU now. And I certainly hope you're taking less than the 5000 IU you found to be toxic.

Let's hope none of us acquire a serious COVID infection this winter.

Well, Richard Carmona, MD, MPH is the former Surgeon General of the United States, and a professor of public health at the University of Arizona. He's hardly a "quack." He reported various facts, including the results of a research study that found which doses typically led to toxicity.

I conceded that blood labs can be helpful. My sister had access to a good physician, and was for a long time unable to raise her levels on 6000 IU per day. It was the sunshine this summer that finally got her enough Vitamin D to relieve the inflammation that was keeping her intestines from absorbing her dietary Vitamin D! She's most likely taking less than 6000 IU now. And I certainly hope you're taking less than the 5000 IU you found to be toxic.

Let's hope none of us acquire a serious COVID infection this winter.