1 in fact, the main components of grape seed extract are proanthocyanidins and some phenols, which have certain antioxidant components, but their effects are limited. Normal people don't need to deliberately take related health care products. Proanthocyanidins are mainly composed of epicatechin, catechin and epicatechin gallate. It should be noted that these ingredients are not unique to grape seeds, but also found in grape skins and pulp, and the specific content may be different.
2. Compared with the antioxidant components contained in other vegetables and fruits, there are not many special substances in grape seeds. As long as the diet is balanced, you can take some antioxidant components from food, and it is not necessary to rely solely on grape seeds or their extracts to supplement the antioxidant substances in the body.
3. If you swallow grape seeds directly when eating grapes, you can certainly get some nutrition, but the amount is very small. This is because it is difficult to completely chew grape seeds by simple chewing, and the human body can digest and absorb less, which is almost negligible. Therefore, it is not necessary to chew grape seeds in order to obtain nutrients in grape seeds.
Extended data
There are many experiments about grape seed extract inhibiting cancer cells, but the conclusion will indicate this sentence: in vitro experiments can inhibit cancer cells. Li Duo, a professor in the Department of Food Science and Nutrition of Zhejiang University, explained that in vitro experiments can inhibit cancer cells and in vivo experiments can inhibit cancer cells, which is completely different. In vitro experiments can inhibit cancer cells, which only shows that further research can be carried out on specific cancer cells. There is no evidence that grape seed extract can inhibit cancer cells in vivo.
According to Yun, a member of the Scientific Squirrel Society, British scholars conducted a second-phase clinical study on grape seed extract to assist cancer patients. Volunteers who received radiotherapy for breast cancer in their early years were divided into two groups. One group took grape seed extract and the other group took placebo. After 12 months, breast induration and breast appearance were detected, and there was no difference between the two groups.
Zhang Tian, a nutritionist in the Clinical Nutrition Department of Aviation General Hospital of China Medical University, said that human cells produce a lot of oxygen free radicals every day, which is closely related to the aging of tissues and cells. Procyanidins in grape seeds are natural antioxidants with low toxicity, which are widely found in skins, shells and seeds of plants, such as grape seeds, apple skins, peanut skins and cranberries.
Proanthocyanidins have high biological activity in vivo after absorption, which can reduce free oxygen free radicals in cells and improve oxidative stress of cells. Although eating this health food for a long time has a certain antioxidant effect, it is not as exaggerated as the merchant said.
Shi Jun, Ph.D. and popular science writer from the Institute of Natural History of China Academy of Sciences, said that grapes and grape products have certain nutritional value, but the components of grape seed extract are complex, so systematic safety research has not been conducted. Before the authoritative experimental results come out, it is suggested that pregnant women, parturients and children carefully choose and eat this grape seed health care product from the perspective of safety.
People's Network-"Magic Efficacy" of Grape Seed Antioxidant