Infants lactose intolerance refers to the lack of lactase in the intestines of the human body, which does not digest the lactose in the milk, resulting in bloating, abdominal pain and diarrhea, nausea, and other gastrointestinal symptoms after consumption of milk and dairy products.
Lactose intolerance is very common in the black and yellow population. Lactose intolerance can occur in infancy due to congenital or acquired conditions.
Lactose is the main sugar in milk. The lactose content in human milk, milk and goat milk is different, and human milk contains 7% lactose. Milk contains 4.2% lactose, goat milk contains 4.6% lactose, and lactose content in cattle and goat milk is lower than human milk. Lactose has no sugar cane sweetness, and its sweetness is one-sixth of that of cane sugar.
The effect of lactose intolerance on nutrition
Lactose not only provides energy to our body, but also its own decomposed galactose is the most important nutrient for brain cells and nerve cells. Long-term lack of galactose can cause mental retardation and stunting in infants and young children. And the key to infant brain development before the age of one year, even after this critical period, even adding more lactase to infants and young children does not help, because this process is "irreversible", so this will greatly hurt the baby. Young children.
Lactose structure and metabolism
Lactose is a kind of disaccharide, the molecular formula is C12H22O11, which is a disaccharide in mammalian milk, hence the name. Its molecular structure is formed by the condensation of a molecule of glucose and molecular galactose.
The main function of lactose is to supply heat to the body. Lactose is the most abundant sugar in milk, and the sugar contained in milk.9.8% is lactose, growth, and development of children and adults, metabolism, tissue synthesis, maintenance of normal body temperature and physical exercise
Labor work requires a lot of heat, especially in children, the decomposition, digestion, absorption, and utilization of sugar are more vigorous than adults. Lactose is the driving force for the development and activity of organs, nerves, limbs, and muscles in children.
Metabolism of glucose and galactose. Glucose is absorbed into the blood and metabolized to produce energy. Galactose is absorbed into the blood and enters the liver and is converted into hepatic glycogen into the blood when needed.
Children's brain cells and the entire nervous system all require a large amount of lactose. Children under one year of age need about 13 grams of sugar per kilogram of body weight per day.
At the same time, lactose can maintain the balance of water in the body, provide galactose related to the composition of the brain and vital organs, and is also necessary for the storage of starch. Galactose is particularly important for children's brain development, which promotes the production of glycosides and mucopolysaccharides. Lack of lactose can cause children to lose weight, reduce body weight, slow growth, and even children who consume protein in the body may develop protein deficiency.
Galactose can constitute cerebroside, which is a component of cerebrosides in the cranial nervous system and is closely related to the rapid growth of the brain after birth.
Lactose can promote intestinal probiotics and inhibit intestinal pathogenic bacteria. Another important role of lactose is to promote the intestinal tract of children.
The lactic acid bacteria in the intestines grow and grow. In the intestine, lactose produces lactic acid under the action of lactic acid bacteria, various enzymes, and certain microorganisms. The lactic acid has a protective effect on the gastrointestinal tract of children, which can inhibit the toxin produced by abnormal fermentation in the intestine. The poisoning caused by it can also inhibit the reproduction of harmful bacteria in the intestines.
Lactic acid bacteria promotes probiotics and inhibits the growth and reproduction of pathogenic bacteria. There are 100 trillion bacteria in the human body, 500-1000 kinds, and the fineness in the intestine is about 1-15 kg. Most probiotics are necessary to maintain the body's immunity and physiological functions.
The role of probiotics
(1) promote digestion
Probiotics can ferment lactose to produce lactic acid that is easier for the body to digest and absorb. Hydrolyzed indigestible proteins. Increase the content of soluble calcium, phosphorus and B vitamins in the intestine. Probiotics can also promote the secretion of digestive enzymes, further promoting digestion and absorption. Promote bowel movements and prevent constipation.
Lactose intolerance, after drinking milk, milk in the infant can not be completely decomposed, digested, absorbed and retained in the intestinal lumen, under the action of bacteria to form a variety of harmful substances. It causes intestinal flora imbalance. Causes gastrointestinal problems, chronic lactose intolerance causes chronic diarrhea that is difficult to treat in children, and some children may induce diaper rash.
(2)activation of intestinal mucosa related rabbit epidemic system
Probiotics can activate intestinal submucosal lymphoid tissue and promote the secretion of slgA by B cells. It stimulates macrophage and T lymphocytes to secrete cytokines. The systemic immune system is activated by lymphocyte recirculation, thereby improving the body's immune function.
Lactose decomposes into lactic acid to promote calcium absorption
Another role of lactose is to promote the absorption of calcium by deaf children during the metabolism of calcium. Lactose decomposes to produce lactic acid, which promotes calcium absorption
The use of is calcium lactate dairy, calcium lactate has the characteristics of high solubility, fast dissolution rate, and high bioavailability. It can prevent and treat calcium deficiency, such as rickets, refractory diarrhea and other diseases that can affect the absorption of vitamin D, calcium and phosphorus and suffer from rickets.
Therapeutic significance of lactose intolerance
The intestine is not only the largest digestive and absorbing organ in the body, but also the largest immune system in the body. The submucosal lymphoid tissue is widely distributed under the intestinal mucosa, which constitutes the first barrier to prevent the invasion of pathogens. The function of the intestinal barrier function is closely related to the health status and disease resistance of human health.
In general, lactose is a very important nutrient in the early nutrition of infants and young children and has an irreplaceable effect on the growth and development of infants and young children. Lactose intolerance can affect the growth and development of infants and young children and even affect mental development. Lactase supplementation is an effective measure to address lactose intolerance and can better promote breastfeeding diet.