• Vitamin D3, sunshine vitamin
    May 20, 2022 Vitamin D3, sunshine vitamin
    Vitamin D3 is an important substance required by the human body, and its main physiological functions are as follows. 1. to improve the absorption of calcium and phosphorus by the body and to saturate plasma calcium and plasma phosphorus levels 2. promoting growth and bone calcification and sound teeth 3. increasing phosphorus absorption through the intestinal wall and increasing phosphorus reabsorption through the renal tubules. 4. maintaining normal levels of citrate in the blood 5. preventing the loss of amino acids through the kidneys.   Vitamin D is a class of fat-soluble vitamins that are steroidal compounds, known for their important role in maintaining bone health.   Vitamin D2 (ergocalciferol) and vitamin D3 (cholecalciferol), collectively known as calcitriol, are the two most prominent vitamin D's that are closely associated with human health.   Vitamin D2 is produced by ultraviolet light exposure to ergosterol in plants, but it is scarce in nature and cannot be synthesized by the body.   Although vitamin D3 can be obtained from the diet, the types of foods that provide vitamin D are few and low and unstable. Therefore, most of the vitamin D required by the human body (80% to 90% or more) has to be synthesized through exposure of human skin to ultraviolet light from sunlight.   The ultraviolet rays of sunlight with wavelengths of 290~315nm penetrate human skin, and the 7-dehydrocholesterol in the skin is activated by the double bond after ultraviolet radiation and transformed into vitamin D3 precursors, which need to undergo two kinds of hydroxylation in the human body to activate and thus exert biological effects, so people call vitamin D3 as ''sunshine vitamin''.   The main function of vitamin D is to work synergistically with parathyroid hormone and calcitonin to balance the levels of calcium ions and phosphorus in the blood to maintain strong and healthy bones and muscles. We are familiar with rickets, chondromalacia, osteoporosis and other systemic chronic diseases characterized by skeletal lesions, which in many cases are caused by insufficient intake of vitamin D in the body, resulting in disorders of calcium and phosphorus metabolism.   In addition to the well-known bones, kidneys and intestines, vitamin D receptors (VDR) are also widely distributed in the blood lymphatic system (e.g. T lymphocytes, B lymphocytes, etc.), the genitourinary system (e.g. breast, prostate, ovaries, etc.), as well as in the nervous system, parathyroid glands and other tissues and cells in the human body, and they control 3% of the entire human genome and about 200 species of human gene network. Therefore, the effects of vitamin D deficiency are not only limited to the skeletal and muscular systems, but are also associated with autoimmune diseases, cardiovascular diseases, Parkinson's disease in the elderly, obesity, malignancies, and other conditions.   In most industrialized countries, vitamin D deficiency sym...
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  • The healthiest light——natural light
    May 13, 2022 The healthiest light——natural light
    Under the sun, everything grows.   Our ancestors did not yet understand the mysteries of the sun, but they observed the nurturing and sheltering power of this luminous celestial body in their daily lives with the sun.   The eye of Ra, the supreme god of ancient Egypt, and later the right eye of the Eye of Horus, symbolized the sun in its fullness and integrity, which was the totem of the ancient Egyptians and was used to ward off evil and cure disease.   Egyptian wall paintings and statues in the Amarna style also record the "naturalistic'' lifestyle of the pharaoh Akhenaten and his queen Nefertiti, who believed that the sun's rays gave strength to life and brought spiritual and physical perfection. The ancient Egyptians were keen on skinny dipping and sunbathing to expose their bodies to more sunlight.   Indian Ayurveda is the oldest medical system in the world. The Vedas record the ancient Indian ritual of paying homage to the sun god at sunrise for vitality and health, which is the origin of the most classic yoga asana, the bhajana, passed down from ancient India to this day.   Mankind's use of sunlight to heal and strengthen the body began millennia ago. Hippocrates, the father of medicine, said that "the best physicians on earth are sunlight, air and exercise", and after he learned about the healing power of sunlight during his travels in Egypt, he began to use sunlight therapy extensively in the treatment of many diseases and built solariums for the treatment of skin diseases.   In the late 19th century, people gradually began to explore the health-promoting effects of natural light through life science research methods. The Swiss Arnold Rikli, known as the "sun doctor," was a pioneer in modern day heliotherapy when he developed the theory and practice of sunbathing to treat chronic diseases and dysfunctions of the body.   In 1877, Arthur Downes and Thomas Blunt in England conducted a series of test tube experiments to investigate the effect of sunlight on the growth of bacteria and microorganisms, they discovered the killing power of direct sunlight on bacteria, and concluded that the blue-violet region of the solar spectrum could have a bactericidal effect.   In early 20th century Europe, sunlight was heavily promoted as a new and progressive approach to medicine. More and more scientific practice proved that natural light plays an extremely important role and influence on human life and health.   The transformative development and integration of modern physics, biology, medicine, optics and other disciplines have opened up a broader space for the exploration and utilization of the healing effects of natural light.   From spectral composition, photothermal effect, photosynthesis, animal vision and other photochemical reactions, people have gained a deeper and more systematic understanding of natural light.   From participating in vitamin D synthesis, regulating biological rhythms, inf...
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