Summer is approaching, so is the sun protection work is so good or not?

The coming of a hot summer is a very important thing for beauty love women. However, experts suggest that sun protection should not be excessive, otherwise it is not good for health.

Bian Pingda, chief physician of the Department of Orthopedics of the People's Hospital of Zhejiang Province, has visited a special patient -a small king in his 20s due to mite allergies, who knows that the left chest drama appeared on the left chest after 3 consecutive coughs. Pain, X -films found the 10th rib fracture on the left!

Further inspection found that Xiao Wang's bone density was significantly lower than that of women in the same age. Serum 25-hydroxyl vitamin D was only 8 nake/ml (a serious lack of vitamin D), and the remaining examinations were not abnormal. Finally, the fracture of the little king was caused by the severe lack of vitamin D, which caused a decline in bone density.

As we all know, the elderly (especially the elderly women) are susceptible to osteoporosis, and the bone density of the little king is at its peak. How can a fracture occur after coughing? Bian Pingda carefully asked Xiao Wang's living habits and found the "culprit". It turned out that Xiao Wang used SPF50 and PA ++++ sunscreens on the 365th day of the year.

Use sunscreen every day, which is prone to vitamin D deficiency

Vitamin D can promote intestinal absorption of calcium and phosphorus, inhibit the release of thyroid hoss, and ensure normal bone growth and development and metabolism. Vitamin D in the body is long -term insufficient, and it is easy to induce osteoscopy.

Bian Pingda told reporters that the main ingredients of sunscreen to the ultraviolet spectrum absorbed by amino benzoic acid (PABA) are 240-400 nanometers, and the ultraviolet spectrum of skin synthetic vitamin D can promote 290-320 nanometers. Therefore The ultraviolet rays that promote skin synthesis are absorbed by all PABA, and the vitamin D produced is minimal.

Bian Pingda said that young people's skin synthesis of vitamin D is relatively strong. Facial and upper limbs are exposed in the sun for 20 minutes, which can generate about 2000IU (international unit) vitamin D. If you expose the sun 3 times a week and 20 minutes each time, you can meet the body's needs for vitamin D.

Of course, Bian Pingda believes that outdoor sports in summer, the sunshine is properly used in places where the sun is stronger.

Moderate exercise helps bone health

In addition to the level of vitamin D, bone health is also related to moderate exercise.

The Provincial People's Hospital surveyed the relationship between 512 elderly men's movements and their osteoporosis. It was found that the prevalence of the prevalence of motion (12%) was about half (21%) that did not insist on exercise. In addition, compared with the elderly men (15 nake/ml) who have not persisted, the average level of serum 25-hydroxyl vitamin D (18 nike/ml) insisted on exercise is significantly higher.

What is the mechanism of sports strong bone?

Bian Pingda told reporters that first of all, during the exercise, the tensile, cut force, and squeezing of different muscles and tendons can cause a certain stimulation of the bones, which can help promote the calcium in the bones in the bones. Deposition and orderly arrangement to improve the strength and biological characteristics of the bone; secondly, exercise can not only effectively increase the blood flow of bone, promote the supply of nutrients, but also regulate the body's endocrine system, increase serum testosterone and estradiol levels, suppress the inhibition The secretion of thyroxine, thereby suppressing bone absorption and delaying bone loss. Third, insisting on outdoor exercise can also increase the level of serum 25-hydroxyl vitamin D, and sufficient vitamin D can not only promote the body's absorption of calcium, but also Helps reduce the risk of falling and fractures.

How to scientifically supplement vitamin D

For some people with excessive sun protection or insufficient sun, how to supplement vitamin D?

Bian Pingda suggested that first of all, pay attention to eating more foods with more vitamin D in daily diet, such as 100 grams of sardine, salmon and tuna contain vitamin D 500IU, 360IU and 230IU, 240 ml of milk and 100 grams of fresh mushrooms It contains about vitamin D100IU, 100 grams of liver and 1 egg yolk contains about vitamin D20IU; secondly, pay attention to regularly detecting serum 25-hydroxyl vitamin D levels. For vitamin D deficiency (25-hydroxyl vitamin D ≤20 nache/ml), in addition to increasing outdoor activities, vitamin D preparations should be taken under the guidance of the physician.

What are SPF and PA

SPF and PA are two special terms of sunscreen. Among them, the SPF is the sunscreen index. Its coefficient indicates that the sunscreen can effectively prevent outdoor ultraviolet rays. Usually 20 minutes as the standard. The SPF50 is equivalent to sunscreen for 1,000 minutes. Strong sunscreen effects; and PA values ​​are the index of product blocking the ultraviolet of life. Generally, "+" is represented by "+", and "++++" represents the highest effect protection effect.

(Reporter Yi Longyin)

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