Q. Dear Terry, “I started taking vitamin D last fall for overall health. Do I need to keep taking vitamin D during the summer? I’m outside more during the summer, but not every day.”– Noelle R., Grand Rapids, MI

A. Dear Noelle, Vitamin D is incredibly important to virtually every cellular process within our body. When our skin is exposed to sunlight, there are certain cells that undergo changes and convert a special kind of cholesterol into usable vitamin D. There are many factors that can impact how efficient this process is: including age, latitude, cholesterol status, ethnicity, and many others.

Because vitamin D levels can vary greatly during the year, it may be helpful to check your vitamin D levels. Vitamin D levels can be checked through a blood test and can be ordered by your healthcare practitioner.

In general, most people need about 5,000-10,000 IU (125 to 250 mcg) of vitamin D per day for the maintenance of good health. During the summertime, you may opt for a lower dose if you are getting consistent sun exposure. There are two forms of vitamin D: D3 (cholecalciferol) and D2 (ergocalciferol). Research has shown that vitamin D3 is much more effective at raising vitamin D levels. I prefer to use vitamin D3, as cholecalciferol, because it is in the human form.

Healthy Regards!

Terry . . . Naturally