If you want to prevent hair loss, take a day with 20 minutes of sunshine.

If you want to prevent hair loss, take a day with 20 minutes of sunshine.

 Vitamin D is produced in the body by sunlight for more than 20 minutes a day, and hair loss such as round hair loss can be reduced. This is because when the amount of vitamin D involved in the production of immune cells is reduced, white blood cells attack the hairy hair follicles and the pores are closed.

Professor Ben Basha Christian Bamshidad Kadeh of Pondicherry University of Medical Sciences of India said on November 6 that 45 people who had hair loss and 45 people who had normal hair were analyzed for vitamin D in the blood.

The researchers measured the amount of vitamin D in the blood and the CRP level, a measure of the body's immune system, for both groups. CRP levels are normal at 10 ng / ㎖, beyond which there is a high incidence of inflammatory diseases such as chronic enteritis and leukemia. The researchers also compared the levels of SALT, vitamin D and inflammation, which indicate the degree of hair loss.

As a result, the amount of vitamin D in blood was measured as 18ng / ㎖ in the hair loss group. While the normal hair group was 31 ng / ㎖. About two times the difference. The normal level of vitamin D in the blood is 20 ng / ml. CRP levels were 14 mg / L for hair loss group and 4 mg / L for normal hair group. More than three times the difference. Income levels and obesity including waist circumference did not affect the results of the study.

In this study, people with severe hair loss had higher CRP levels. The higher the number, the more inflammatory reactions occurred, and the lower the concentration of vitamin D in the body. This suggests that if vitamin D is not sufficient in the body, hair loss progresses quickly.

The recommended daily dose of vitamin D is 5 ng (micrograms). Vitamin D should be sunlit for about 20 minutes a day, one egg, a black bean and a steady diet should be supplemented. If you have more than 100 hairs per day and your hair is noticeably tapered, it is a good idea to visit the hospital.

In this experiment, the researchers found that vitamin D does not cause hair to grow, but it makes it less hairy. Further studies have shown that the immune system involved in hair loss has a negative effect on skin diseases such as atopy.

The researchers paid attention to the relationship between round hair loss and vitamin D, because recent experiments have shown that there is a vitamin D-absorbing cell in hair follicles. Round hair loss is a disease in which the hair falls into a circular shape with tapering hair, which can be slowed down by steroid injections or phototherapy. However, if we can figure out how vitamin D is absorbed in hair follicles, it will be possible to develop anti-alopecia drugs.

"This is a testament to the effects of vitamin D on hair thinning," said Professor Benkata, who led the experiment. The study was published in the November issue of the journal Clinical and experimental medicine.