First of all, lutein nutrition depends on the source of lutein, and pure natural lutein is definitely the best. For example, lutein of a domestic brand is a chemically synthesized lutein ester. For example, the sources of Yousiyi, Nordic formulas Novolas, Swisse and lutein are all natural marigold.
Secondly, it depends on the absorption ratio. Small molecular lutein is better than large molecular lutein, and the ratio of lutein to zeaxanthin is 5: 1, which is most beneficial for human absorption. Now, except for some products, we don't name them, and almost all the rest can be small molecules and the ratio of 5: 1. It's time to look at the patent. For example, Nordic Formulas Novolas is a free-state small molecule Lutemax2020 specially studied. Patented, clinical shows that the absorption rate can be increased by 50%.
Finally, it depends on other active ingredients. After all, eye protection is not only effective in eating lutein. , Jia, etc. Mainly lutein. But there are also some effective additions such as Vc and ve blueberry extracts, such as Yousiyi, Shuangxin, Baodecong and so on. However, in addition to bilberry extract, millet grass, selenium, zinc, vitamin A, vitamin B 12 and vitamin E, Novolas also added10% astarial? Patented astaxanthin, a combination of double antioxidant gold, is the only one on the market.