The concept of using sunlight for health care originated more than 3,000 years BC. The ancient Egyptians discovered that the sun was good for the human body; the ancient Greeks, the father of medicine, Hippocrates used sunlight to treat edema, abdominal and kidney diseases; In ancient China, the concept of lighting to promote health has been proposed. Sun Simiao in the Tang Dynasty discovered the effect of sunlight on preventing diseases. In 1903, Professor Srebofensen of Denmark used light to treat skin diseases and proved that light had a positive therapeutic effect on biological cells. He not only won the Nobel Prize, but also started the research on phototherapy.

Sunshine is one of the most important and basic conditions for all living things including human beings to survive and grow on the earth. All the nutrients, minerals and vitamins we consume have their own unique energy absorption spectrum. As early as the 1960s, Professor Szent-Gyorgyi, who won the Nobel Prize in Medicine for discovering vitamin C, once said: "All the energy of our human body comes from the sun's rays." Because sunlight supplies all the energy needed for plant growth, plants Nutrients necessary for survival and growth are synthesized through these energies, and energy from the sun is stored at the same time. Plants are ingested by animals and humans, thus supplying the energy needed for human survival and growth.

Natural sunlight has red, orange, yellow, green, blue, indigo, and purple balanced and complete wavelengths and energy, which can penetrate the human skin and enter the human body to interact and react with various chemical substances and minerals, assisting the body with essential nutrients The synthesis of substances, as well as the decomposition and excretion of various types of waste. Therefore, sunlight not only has a key influence on plant growth, but also has a considerable decisive effect on human health.

Positive functions of sunlight on health

What are the effects of sunlight on human health? In 1980, scientist Dr. McDonagh proved in a study that natural sunlight or full-spectrum artificial light can treat jaundice, because specific wavelengths in these lights can convert bilirubin in the blood into harmless substance. And we often hear medical experts remind that regular exposure to the sun can promote calcium absorption, because the body's absorption of calcium mainly depends on vitamin D. The human body must synthesize vitamin D3 after irradiating the skin with ultraviolet rays in the sun, and then combine calcium absorption in the small intestine. If the human body is deficient in vitamin D, the absorption rate of calcium will be affected, and no matter how much calcium you eat, it will not be able to help your bones grow. Sunshine can be said to be a "free nutrient" given to mankind by God. Therefore, natural sunlight is of great help to the growth of children's skeletal muscles and the prevention of osteoporosis in middle-aged and elderly people.

From the perspective of Chinese medicine, the back is the yang of the human body, with the distribution of the Governor Vessel and the bladder meridian. The yang meridians of the human body pass through the back and gather at the head. The corresponding Shu points of the internal organs and the six internal organs, sun drying can also regulate the internal organs, which is the fastest way to replenish yang. It is best to bask the Baihui acupoint on the head together, which can enhance the yang energy in the body, prevent diseases and eliminate evils, and is a good way to maintain health.

References:

1. Daily headlines, Little Good Doctor, 2016/06
2. Changchun Monthly Issue 387
3. Chang Chun, Yang Dingyi, 2019/04

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