Silicon dioxide (SiO₂) is one of the trace minerals needed by human body, which plays an auxiliary role in bone development and connectivetissue. It widely exists in natural food and drinking water, but the human body can not directly use its crystal form (such as Shi Ying), and can only participate in physiological processes through amorphous silica or dissolved state. Reasonable intake is beneficial to health, while excessive or long-term inhalation of dust may cause health risks.

First, the physiological function of silicon dioxide supports the health of bones and joints. 1. Silicon dioxide participates in regulating calcium and phosphorus metabolism, promoting bone mineralization and enhancing bone density. Studies have shown that it may help prevent osteoporosis by activating the activity of osteoblasts. In addition, silicon is one of the components of cartilage and connective tissue, which indirectly contributes to joint flexibility. Promote the synthesis of collagen 2. Collagen is an important structural protein of skin, blood vessels and tendons. Silica promotes the cross-linking of collagen fibers by activating related enzymes (such as prolyl hydroxylase), and maintains skin elasticity and wound healing ability. Possible immunomodulatory effect 3. A few studies have pointed out that dissolved silicon may regulate immune response by affecting macrophage activity, but the specific mechanism is not clear and more evidence is needed to support it.

Second, the daily intake of silicon dioxide comes from natural foods 1. Whole grains (such as oats and brown rice), root vegetables (potatoes and carrots), green leafy vegetables (spinach), bananas, apples and other fruits all contain natural silicon dioxide. The silicon content in drinking water usually does not exceed the safety limit because of the great difference in geological conditions. Dietary supplements 2. Some health products add amorphous silica (such as silica gel) as an anti-caking agent or a supplementary source of silicon, but the absorption rate of human body is low, so it is usually unnecessary to supplement it deliberately. Iii. Potential Risks and Precautions The hidden dangers of excessive intake 1. Long-term large intake of silica may increase the risk of kidney calculi, especially for people with renal insufficiency. In addition, silicon-containing health products may interact with some drugs (such as thyroxine) and should be used according to the doctor's advice. Occupational exposure and health hazards 2. Crystalline silica (such as Shi Ying dust) is classified as a class 1 carcinogen by the International Agency for Research on Cancer. Long-term inhalation can lead to silicosis, manifested as pulmonary fibrosis and decreased respiratory function, which is common in mining, construction and other industries. 3. Amorphous silica (such as food additive E551) is generally considered safe, but crystalline silica (such as sandstone and glass fiber) is harmful to human body and needs to be strictly distinguished.

Fourth, summing up the normal diet can meet the human body's demand for silica, without additional supplements. Its health value is mainly reflected in the support of bones and skin, but it is necessary to be alert to the risk of occupational dust exposure and excessive intake. If silicon-containing supplements are used for special needs, it is recommended to give priority to natural food sources and avoid long-term high-dose intake.