Is there a chart available to show the sky conditions ... K.L. Dear K.L.: The major difference in the increased time necessary for vitamin D conversion in Northern areas has more to do with ...

Usually, vitamin D has to be converted into a 25-hydroxyvitamin D (calcidiol) to be used by the body, but in the case of obese people, this does not happen. So the researchers in this study have ...

Is there a chart available to show the sky conditions ... K.L. ANSWER: The major difference in the increased time necessary for vitamin D conversion in Northern areas has more to do with the ...

New research shows a correlation between inadequate vitamin D levels and the amount of narcotic medication taken by patients who have chronic pain. Mayo Clinic research shows a correlation between ...