1 can promote the growth and development of bones.
2. Protect the integrity of granular bodies in cells.
Maintain normal brain function.
5, can improve the body's hematopoietic function.
4. Maintain normal glucose metabolism and fat metabolism.
5, can improve the body's hematopoietic function.
The important role of manganese in human body can be seen not only from the fact that the human body contains normal manganese. The symptoms of manganese deficiency in human body can also reflect the importance of manganese to human body. The daily intake of manganese is 2~5mg, and the absorption rate is 5%~ 10%. If it is less than this amount, symptoms of manganese deficiency may occur. Symptoms of manganese deficiency will affect reproductive ability, which may lead to congenital malformation, abnormal bone and cartilage formation and impaired glucose tolerance in offspring. In addition, the lack of manganese will cause neurasthenia syndrome and affect intellectual development. Manganese deficiency can also lead to the reduction of insulin synthesis and secretion, affecting sugar metabolism.
The daily manganese supply for adults is 0. 1 mg per kilogram of body weight. In food, tea, nuts, coarse grains and dried beans contain the most manganese, while vegetables and dried fruits contain slightly more manganese than meat, milk and aquatic products, while fish liver and chicken liver contain more manganese than meat. Generally, a vegetarian diet can supply 5 mg of manganese every day, which can basically meet the needs. Excessive manganese content in polished rice, white flour, meat and milk will decrease. When normal people lose weight and have low sexual function, and their hair turns gray early, it is suspected that manganese intake is insufficient.
In addition, walnuts, wheat teeth, molasses, lettuce, dried kidney beans, peanuts, potatoes, soybeans, sunflower seeds, wheat, barley and liver are also rich in manganese.
If the human body lacks manganese, it will affect growth and development. Manganese deficiency in pregnant women leads to manganese deficiency in infants, which may lead to dyskinesia in newborns; Manganese deficiency in children and adolescents will damage growth and lead to skeletal deformity; Manganese deficiency in adults may lead to reproductive dysfunction. Although the manganese content on the seabed is very rich, and the effect of manganese on human body is not small, the demand for manganese by human body is still very small. In the diet of ordinary people, the daily demand for manganese is 4-9 mg, about half of which is absorbed by the intestine.
Manganese is also involved in hematopoiesis. Animal experiments show that 10- 15-day embryos are very rich in manganese, and there are more manganese in bones and liver, which may be related to their hematopoietic function. Low dose of manganese salt or manganese-containing protein can increase hemoglobin, young red blood cells, mature red blood cells and whole blood. The mechanism of manganese participating in hematopoiesis may be to improve the utilization rate of copper, promote the absorption and utilization of iron and the mature release of red blood cells.
Osteoporosis is a common and frequently-occurring disease in the elderly. Its main performance is that the whole body bones become thinner and brittle, and the strength and toughness decrease. Many patients not only have back pain and fatigue, but also have fractures. Some people accidentally fall to the ground or bend over, and minor injuries may cause fractures. This condition is particularly common in wrist joints and femoral neck.
As we all know, the main cause of osteoporosis is calcium deficiency, because the main substances supporting human bones are composed of organic substances rich in collagen and minerals mainly containing calcium and phosphorus. With the increase of age, due to the decrease of gastric acid secretion, the absorption and utilization rate of calcium decreased, and the loss rate of calcium increased day by day. This happens mostly after women are 50 years old and men are 60 years old. When the intake of calcium in human body is too small, in order to maintain its physiological function, calcium in bone tissue will be released for compensation, which is called "calcium migration". If this shortage of people continues for a long time, bones will become loose and porous and easy to fracture.
In recent years, American scholars have found that there are osteoblasts and osteoclasts in bones, and their physiological functions are complementary, and they maintain the metabolism of bones. However, when manganese is deficient in the body, the activity of osteoclasts is enhanced, while the activity of osteoblasts is inhibited, and the growth rate is slowed down, resulting in osteogenesis obstacles. The dynamic balance originally established in the body is destroyed, and over time, bones will become loose, so insufficient manganese content in the body is also one of the factors leading to osteoporosis.
Clinical research shows that the content of manganese in patients with osteoporosis is only 1/4 of that of normal people. After a long-term investigation, Chinese experts found that the manganese content in drinking water of residents in longevity areas such as Bama Yao Autonomous County and Xinjiang in Guangxi was significantly higher than that in other areas, and the manganese content in hair of elderly people over 90 years old was very high. However, the content of manganese in the blood of elderly patients with osteoporosis is significantly lower than that of pre-elderly patients. Generally speaking, an adult should consume at least 3 per day. 5-5 mg of manganese can meet the needs of the body, and the tentative standard in China is 5- 10 mg. As long as the elderly are not picky eaters, partial eclipse, keep a balanced diet and eat various nutrients regularly, there is no need to supplement manganese. The main source of manganese is cereals. Wheat, nuts, tea and fresh green leafy vegetables also contain more manganese, especially manganese in tea, so the elderly should eat more of these foods to prevent manganese deficiency in the body.