In addition to promoting calcium absorption, sunlight can also reduce "three highs" and reduce the risk of cancer.
If we are exposed to sunlight moderately, our skin will convert cholesterol into vitamin D. Vitamin D plays an extremely important role in promoting healthy bone growth and development in children and maintaining bone health in adults.
New research has found that vitamin D is also essential for the normal functioning of the heart, nervous system, coagulation process and immune system. If the body lacks vitamin D, adults are prone to osteoporosis and children are prone to rickets, leading to bone malformation and deformity. Vitamin D deficiency may also lead to a variety of diseases, including various cancers, diabetes, heart disease, arthritis, psoriasis and mental illness.
Cholesterol is an important component of cell membranes. It helps the brain transmit information and assists the immune system to protect us from cancer and other diseases. In addition, it is an indispensable part of our body's production of vitamin D. This chemical process is similar to photosynthesis, and both rely on the action of sunlight.
If you knew that you could convert excess cholesterol in your body into vitamin D through adequate sunlight exposure, wouldn't you be willing to try sunbathing before deciding to take lipid-lowering drugs for the rest of your life?
In addition, sunbathing can regulate blood pressure by inhibiting the activity of the renin-angiotensin system in the body, preventing it from being too high or too low. A study by the National University of Malaga in Spain found that low vitamin D levels due to insufficient sunlight exposure can increase the risk of obesity and type 2 diabetes. A study by Queen's University in Canada showed that sufficient sunlight exposure in youth can reduce the risk of breast cancer by at least 17%. The British Medical Journal published an article stating that the level of vitamin D in plasma is negatively correlated with the risk of cancer.
Sunlight affects sleep, mood and immunity by stimulating the brain
Scientists have found that sunbathing can actually change the activity of neurons in our brains through surveys and experiments on a large number of participants. The light produced by sunbathing stimulates the pineal gland in the brain, thereby regulating the endocrine system. The pineal gland is the key organ in the brain responsible for secreting melatonin, and melatonin directly affects our sleep, mood and immunity.
In addition to regulating the pineal gland, sunbathing can also promote blood circulation and increase the oxygen and nutrient supply to brain cells. Sunbathing can also help relieve psychological problems such as depression and anxiety, making us happier and more positive in facing life.
阳光除了能促进钙质吸收，竟然还能降“三高”、降低患癌风险
如果我们适度地暴露于阳光下，我们的皮肤会将胆固醇转化为维生素D。维生素D在促进儿童骨骼的健康生长发育和维持成年人的骨骼健康方面发挥着极其重要的作用。
新的研究发现，维生素D对于心脏、神经系统、凝血过程和免疫系统的正常工作也是至关重要的。如果体内缺乏维生素D,成年人便很容易患上骨质疏松症，儿童则容易患上佝偻病，导致骨骼发育不良和畸形。维生素D缺乏还可能导致多种疾病，包括各种癌症、糖尿病、心脏病、关节炎、牛皮癣以及精神疾病等。
胆固醇是构成细胞膜的重要组成成分，它能够帮助大脑传递信息，并协助免疫系统来保护我们免受癌症和其他疾病的侵害。除此之外，它还是我们身体产生维生素D不可或缺的组成部分，这种化学过程类似于光合作用，二者都依赖于阳光的作用。
如果早知道可以通过充足的日光照射将体内多余的胆固醇转化成维生素D，在决定一辈子与降脂类药物为伴之前，你难道不愿意尝试一下日光浴吗？
此外，晒太阳可通过抑制体内肾素-血管紧张素系统的活性来调节血压，防止过高或过低。西班牙国立马拉加大学研究发现，日晒不够导致的维生素D水平较低，可增加患肥胖症和2型糖尿病的风险。加拿大皇后大学研究表明，青年时期晒够太阳，乳腺癌风险至少降低17%。《英国医学杂志》刊文称，血浆中维生素D水平与患癌风险呈负相关。
阳光通过刺激大脑，对睡眠、心情和免疫力产生影响
科学家们通过对大量参与者进行调查和实验，发现晒太阳竟然能改变我们大脑中的神经元活动。晒太阳所产生的光线，会刺激大脑中的松果体，进而调节内分泌系统。松果体是大脑中负责分泌褪黑素的关键器官，而褪黑素则直接影响我们的睡眠、心情和免疫力等多个方面。
除了调节松果体，晒太阳还能促进血液循环，提高脑细胞的供氧和营养物质供给。晒太阳还有助于缓解抑郁症、焦虑症等心理问题，让我们更加快乐和积极地面对生活。
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