Lutein For The Role Of The Eyes?
Source of Lutein
Lutein is widely found in fruits and vegetables, flowers, and some algal organisms, but its existence forms are slightly different. In green vegetables such as kale, spinach, and lettuce, lutein exists in free form (emphasis added: The free state is easier to absorb), while in yellow or orange fruits and vegetables such as mango, papaya, squash, squash, and oranges, lutein exists in the free form. Lutein exists in the form of lutein esters. The lutein in these foods must be hydrolyzed into free lutein in the body before it can be absorbed and metabolized by the body. The content of lutein in marigolds is the highest, 100 times that of ordinary fruits and vegetables, and about 10 times that of chrysanthemums. Tagetes Asteraceae, Tagetes genus, ornamental plants native to Mexico, its petals are rich in lutein and the content of lutein is the highest, and because its pigment composition is mainly lutein, it is one of the ideal raw materials for extracting lutein.
The difference between lutein and lutein esters:
The medical field has long confirmed that both lutein and lutein esters can be absorbed by the human body, but before lutein esters enter the blood, they will be hydrolyzed into free lutein under the action of lipase before they enter the blood. Lutein can also be used as a new food additive.
Before being absorbed by animals, lutein must be hydrolyzed by digestive juice in order to be effectively absorbed and utilized by the intestinal tract. At present, one of the primary uses of marigold lutein is as a feed additive for poultry, and in typical poultry farming, the poultry has reached marketable weight and size before the digestive tract function is mature, so it does not allow poultry to effectively use the lutein. Lutein esters, in order to facilitate absorption and achieve sound coloring effects, need to provide free lutein. Studies have shown that the absorption rate of poultry to lutein esters is only 35-38%, while the absorption rate of free lutein can be as high as 90%.
The utilization rate of lutein in food is closely related to the state of food processing and the destruction of cell structure. In raw food materials, lutein is embedded in the cell structure, so the processing and cooking methods that destroy the cell structure can improve its bioavailability.
Lutein for the role of the eyes?
Lutein is an internationally recognized "eye nutrient", which has certain effects on relieving and improving visual fatigue. In the human body, lutein mainly exists in the macular area at the middle and rear of the retinal lens of the eye. One of the carotenoids in the region (the other is the isomer zeaxanthin of lutein), is responsible for the central vision and high vision of the retina and plays a vital role in vision. Domestic and foreign studies have shown that lutein The mechanism of lutein to protect the retina and relieve visual fatigue mainly has the following two aspects'''One is as a filter for high-energy short-wave harmful blue light: the maximum absorption wavelength of lutein in the visible light range is around the same as the wavelength of blue light Yes, it's not by accident, it's what gives Lutein its blue light filter qualities. Lutein is embedded in the cell membrane of photoreceptor cells in large quantities, and the orientation of the functional light group on the ionone ring is very orderly, that is, extending horizontally and vertically to the outside of the cell membrane, and the orientation of the orthogonal direction allows lutein to absorb Light from all possible directions, which makes it an ideal blue light filter to prevent oxidative damage to the eyes due to photodamage. The second is as an antioxidant: the conjugated double bond on the straight chain of lutein polyisoprene is affected by the light group on the ionone ring, and it is easy to open and combine with active oxygen free radicals. Lutein removes singlet oxygen, Quenching the active oxygen free radicals induced by light and reflects its antioxidant effect, inhibiting the damage of active oxygen free radicals to optic nerve cells, and then achieving the effect of alleviating visual fatigue.
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