In recent years, fish oil and DHA can be regarded as the most popular names in various health foods. In addition to a variety of expensive "deep sea fish oil" capsules, more and more baby formulas have hit the selling point of "adding DHA" and "double DHA". In addition, many children's foods have begun to add DHA. In the dazzling advertisements, many People consciously or subconsciously regard "DHA" as a measure of a good or bad food. The full name of DHA is called "docosahexaenoic acid," a long-chain fatty acid containing 22 carbon atoms. These carbon atoms are connected by chemical bonds, and "hexene" refers to six of them in the "unsaturated" state. Unsaturated chemical bonds are very reactive and prone to reactions. The first unsaturated bond in the DHA is in a specific position, and the chemical nomenclature refers to that position as the "Omega 3" position. Such fatty acids are called "omega 3 polyunsaturated fatty acids." Besides DHA, EPA and ALA (alpha linolenic acid) which people often hear are also such fatty acids. Fish oil is a rich source of DHA. In addition to DHA, fish oil also often contains EPA. The DHA currently on the market is generally derived from artificially cultivated microalgae, which is an acceptable source for vegetarians. The human body can also be converted from other fatty acids to produce some EPA and DHA, but the efficiency is very low, direct intake from the diet or their main source. There are many studies on the effects of fish oil or DHA on health. In the published academic literature, at least dozens of "efficacies" have been studied, and the evidence is quite adequate to "lower blood fat." At present, the scientific community has basically reached a consensus: omega 3, including DHA and EPA. Polyunsaturated fatty acids can effectively reduce blood triglyceride levels, thereby protecting the cardiovascular system. The U.S. FDA also approved the "lipid reducing" effect of a fish oil capsule. Each capsule contains 375 mg of DHA and 465 mg of EPA. The evidence for the other dozens of effects is still relatively small. A few are "probably not effective" (such as for diabetes or liver disease), and most are Is "may be valid" or "evidence is not enough for evaluation." People's greater interest in DHA lies in its influence on the brain. DHA accounts for a very large proportion of unsaturated fatty acids in the brain's nerves and retina. This has led to speculation that it contributes to infant brain development and delays cognitive decline in the elderly. There is some evidence that seems to support such conjectures, but these experimental evidences often have various defects, such as insufficient sample size, indicators that are evaluated as "effective" may not be reliable, and the results obtained by different researchers are inconsistent. Overall, it is "the current scientific evidence can neither affirm nor deny such efficacy." Humans are always more concerned about the development of infants and young children. Many studies have explored the effects of maternal and maternal supplementation with DHA or fish oil on children's development. Supplements include eating fish, fish oil capsules, or DHA. There are some studies that conclude "good for baby development" and some "no significant difference." The problems faced by these studies are the same: it is difficult to conduct large-scale experiments. There are many factors that affect children's development, and it is not easy to find suitable indicators to measure children's neurological and cognitive development. Those studies that support "effective" research are not considered to be sufficiently reliable. Fortunately, it is a regular food ingredient and no adverse effects were found in these experiments. Therefore, it is generally recommended that pregnant women take some fish oil or DHA. Taking into account the fish in addition to providing fish oil, fish is also a very good quality protein, in addition to a variety of vitamins and minerals, eating fish should be a better choice. Although the addition of DHA to infant formula has become a fashion, there is not enough evidence to show a clear benefit for infant development. Of course, this is not to say "no benefit" but "not sure if there is any advantage". The basic idea of ​​infant formula design is "simulated breastmilk" - when it is not clear whether it is good or not, if there is breast milk, then There will always be no mistake. However, DHA is troublesome. Different researchers have reported DHA concentrations in breast milk in different regions, different ethnic groups, and different lactation periods. It has been found that there is a large difference between them. High to 1% of total fatty acids, but less than 0.1%. Under this circumstance, it is difficult to work out a "DHA content requirement in infant formula". At present, the specifications of each country are "no upper limit has no limit", that is, it can be added or not, but it is not allowed to exceed. Limited amount. For example, the Chinese standard is "not to exceed 0.5% of the total fat content". Foods with "DHA added" on the market have expanded from infant formula to rice flour, edible oil and other categories. The addition of these more is the need for marketing hype, and the actual nutritional significance is very limited. The more unsaturated bonds in fatty acids, the poorer the stability. Compared with ordinary vegetable oils, DHA oxidation rate is tens to hundreds of times faster. In particular, there are often some metal ions in foods, which further worsens the stability of DHA. How to avoid the oxidation of DHA added to food, food companies all over the world have no good way. Therefore, rather than eating foods that do not eat "add DHA", it's easier and more reliable to eat a little fish. Fish oil capsules are still more reliable than foods that contain DHA. Bright led louver fitting,Rigid and Durable Recessed Louver Fitting,Led Lighting Fixture Louver Fitting Recessed,Recessed Louver Fitting,led recessed louver fitting Ningbo Wellway Optoelectronic Technology Co.,Ltd , https://www.wellwayopto.com