First of all, let's clarify that lutein and lutein esters are two different things, but they are not completely different. This is just a matter of attribution. The main form of lutein in natural plants is lutein esters. So, what exactly is the difference between lutein and lutein esters?
(A: Lutein, B: Lutein Esters)
1. Property
Lutein is a plant lutein, which is a very powerful antioxidant.
The main component of lutein ester is lutein dipalmitate, which exists in all-trans molecular configuration. It is a carotenoid and a fatty acid.
2. Absorption Method
Lutein is mainly obtained from the daily diet and can be absorbed directly into the intestines by the human body.
However, lutein esters enter the human body and are first decomposed, and then converted into lutein and then absorbed by the human body.
3. Stability
In the process of storage and consumption, the utilization rate of lutein will be greatly reduced due to changes in light, heat and PH value. Its light and thermal stability is not as good as lutein ester. Lutein esters are more stable in storage and consumption due to their molecular configuration. Then the utilization rate of lutein is also low.
4. Function
Lutein has an anti-aging effect. It can resist cardiovascular sclerosis and other diseases. Lutein also contains more carotenoids, so it also has the effect of eye protection. Lutein is not equal to lutein ester. Lutein ester needs to be digested into lutein before it can be absorbed, and lutein can be absorbed directly. Generally speaking, the market price of lutein is higher than that of lutein ester.
5. Acid Resistance
Lutein has poor acid resistance, and it is more likely to be dissolved by stomach acid after direct consumption and affect human absorption.
The consumption and loss of lutein esters are very low when they pass through the stomach after eating and do not affect the human body's absorption.
Which Is Better?
Which form is better at present is still inconclusive. Studies have shown that after taking lutein or lutein ester continuously for 3 months, there is no significant difference in eye macular pigment density and blood lutein concentration. However, to achieve the same blood lutein concentration, the lutein ester dose needed to be ingested is greater than the lutein dose.