1. You often get sick
One of the most important roles of vitamin D is to keep the immune system strong, so that viruses and bacteria have no chance of making you sick. Vitamin D has a direct interaction with the cells that are responsible for fighting infections. If you often get sick (such as a cold or the flu), low vitamin D levels can be a contributing factor. Various studies have shown a link between vitamin D deficiency and respiratory infections such as colds, bronchitis and pneumonia.
A number of studies have shown that taking vitamin D supplements daily can reduce the risk of respiratory infections. In one specific study with people with chronic lung disease COPD, only those who had a severe vitamin D deficiency experienced a significant benefit after taking a high-dose supplement for one year.
2. You are often tired
If you feel tired it can have many causes, and vitamin D deficiency can be one of them. Unfortunately, this cause is often overlooked. Studies have shown that vitamin D deficiency can cause fatigue, which has a serious negative effect on quality of life. In one case, a woman who complained of chronic fatigue and headache turned out to have a vitamin D blood level of only 5.9 ng / ml. This is extremely low because everything below 20 ng / ml is considered a deficiency. When the woman took a vitamin D supplement, her level rose to 39 ng / ml and her symptoms disappeared.
A large observational study was also conducted into the relationship between vitamin D and fatigue in young women. The study found that women with blood levels below 20 ng / ml or between 21-29 ng / ml were more likely to complain about fatigue than women with blood levels of more than 30 ng / ml. Do you often suffer from back pain in the winter? That too can be a cause of vitamin D deficiency. You can read it on the next page!