Do you also wonder why you often catch a cold in the cold season, even though you eat healthy and get enough exercise?
The reason may be a vitamin D deficiency. Vitamin D is important for the immune system, but it can only be produced in the skin with the help of sunlight.
So in the gloomy months, you are bound to have a vitamin D deficiency and should take the sunshine vitamin as a dietary supplement in consultation with your doctor.
Unfortunately, it is not possible to remedy an acute vitamin D deficiency through diet alone. In the overall vitamin D balance, the vitamin D ingested through food takes up only 10-20% of the total required. Of course, there’s still no harm in trying to supplement your own balanced diet with vitamin D-containing foods.
Metabolic Balance Blog 