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.
The Schilling test is performed to evaluate vitamin B12 absorption. B12 helps in the formation of red blood cells, the maintenance of the central nervous system, and is important for metabolism. Normally, ingested vitamin B12 combines with intrinsic factor, which is produced by cells in the stomach. Intrinsic factor is necessary for vitamin B12 to be absorbed in the small intestine. Certain diseases, such as pernicious anemia, can result when absorption of vitamin B12 is inadequate.