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.
Testing Your Vitamin D Level. There's a simple blood test used to check your vitamin D level, called the 25-hydroxyvitamin D test. Current guidelines by the Institute of Medicine set a blood level of 20 nanograms per milliliter (ng/mL) as a goal for good bone health and overall health.