DHA, scientific name docosahexaenoic acid, is one of the important polyunsaturated acids needed by human body and an important chemical substance that constitutes the brain.

DHA is one of the essential fatty acids for human body. Essential fatty acids are essential to maintain the function of various tissues, and when lacking, they can cause a series of symptoms, including growth retardation, abnormal skin scales, infertility, mental retardation and so on. As an essential fatty acid, DHA plays a more significant role in enhancing memory and thinking and improving intelligence. For example, population epidemiological studies have found that people with high DHA content in their bodies have strong psychological endurance and high intellectual development index. DHA can also prevent myopia and improve vision. If a woman lacks DHA in her diet during pregnancy, it may lead to fetal blindness.

Nutritionist's suggestion: The best food source of DHA is fish, which is high in polyunsaturated fatty acids, and protein is a high-quality protein, which is beneficial to human absorption and inexpensive. Pregnant women and the elderly should eat it often, at least three times a week.

Vitamin C, also called ascorbic acid, is a water-soluble vitamin. It is the most unstable of all vitamins. When stored, processed and cooked, it is easy to be destroyed, oxidized and decomposed. Vitamin C synthetic product is a white crystalline powder, and its aqueous solution deteriorates quickly in air, especially in alkaline solution, which is usually colorless to light yellow-yellow-brown. Tablets are easy to change color when exposed to light and heat during storage, so this product should be stored in a dark and sealed place.

Vitamin e, also known as vitamin e, tocopherol or elixir, or VE for short, is also known as "western ginseng". It is an essential component of human nutrition and the safest and most effective free radical scavenger found so far. VE can't synthesize itself in human body, but it also participates in normal metabolism of human body, so it must be supplemented in vitro.