7 signs telling you to take vitamin D supplements

　　1． Bone pain.

　　Adults who are deficient in vitamin D are more likely to develop bone and muscle pain, especially in the winter. My joints feel stiff when I get up in the morning.

　　2． Feeling depressed.

　　Vitamin D can improve nerve levels of the transmitter serotonin, thereby improving mood. Research has found that vitamin D supplementation can significantly reduce the risk of depression.

　　3. Over 50 years old.

　　USA cancer According to the association, the older you get, the more skin The ability to produce vitamin D is reduced. elderly Spending more time indoors and less time in the sun is more likely to cause vitamin D deficiency.

　　4． Being overweight or obese.

　　Excess body fat can lower blood vitamin D levels. The reason is that vitamin D is fat-soluble, and the more body fat you have, the easier it is to be "diluted". People who are overweight or obese may need more vitamin D supplements.

　　5. Dark skin.

　　Multiple studies have shown that skin pigments act as natural sunscreens. Applying SPF 30 sunscreen reduces the skin's ability to produce vitamin D by 97%. People with dark skin need to spend 10 times more time in the sun to get the same amount of vitamin D as people with white skin.

　　6． The head likes to sweat.

　　Sweating on the head is a classic symptom of vitamin D deficiency.

　　7. Intestinal problems occur.

　　Research from the National Institutes of Health found that Crohn's disease and celiac or enteritis can affect fat absorption and make vitamin D deficiency more likely.

　　Experts say that in order to prevent vitamin D deficiency, proper sun exposure is very important. Exposing the skin on the arms, legs, abdomen and back for 10 to 15 minutes can help supplement vitamin D. The best time is between 10 a.m. and 3 p.m., and no more than half an hour at a time.