San Francisco weather essentials. In San Francisco, if you donât like the weather, just drive a few miles. The temperature at both ends of the mile-long Golden Gate Bridge can be 20Â°F different. Since a cityâs average temperature for the year is not helpful to travelers, here is a general breakdown of what to expect.
Vitamin D Tests. One of the more common vitamin and mineral blood tests is the vitamin D test. A vitamin D deficiency or excess can lead to problems such as bone malformation, bone weakness and improper calcium metabolism.
A simple blood test called the 25-hydroxy vitamin D test can measure levels of vitamin D in the blood. Levels of the vitamin are measured in nanograms per milliliter (ng/mL). 20 ng/mL to 50 ng/mL is an adequate level for bone and overall health, and a level less than 12 ng/mL indicates vitamin D deficiency.