Stabilisation Of Lutein And Lutein Esters

By Author: Alice
Total Articles: 8
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Lutein is a carotenoid, which is widely found in vegetables, fruits, flowers and other plants. It is the main pigment that exists in the macular area of the retina of human eyes. Lutein is an important antioxidant that provides a large amount of lutein to the human body, which helps maintain vision persistence, improve visual response time, and reduce visual damage.
Lutein ester is an important carotenoid fatty acid ester, which is decomposed into free lutein after being absorbed by the human body.

The effect of light on the stability of lutein and lutein esters(Lutein crystals and lutein ester acetone aqueous solution)

Remark:

A--Dark

B--Indoor Daylight

C--Outdoor Sunlight

Sample Condition Absorbance at different time
0h 0.5h 1h 12h 72h 120h 240h
Lutein
Esters  A 0.853 0.849 0.857 0.853 0.864 0.87 0.854
B 0.853 0.846 0.838 0.747 0.332 0.02 0.008
C 0.853 0.003

Lutein A 0.855 0.855 0.854 0.85 0.851 0.843 0.842
B 0.855 0.855 0.842 0.721 0.442 0.108 0.007
C 0.855 0.003

The effect of temperature on the stability of lutein and lutein esters (Lutein crystals and lutein ester edible blending oil solution)

Time Absorbance of lutein esters/Absorbance of lutein
℃ 25℃ 40℃ 80℃ 100℃ 25℃ 40℃ 80℃ 100℃
0h 0.713 0.713 0.713 0.713 0.722 0.722 0.702 0.702
1h 0.713 0.7 0.688 0.679 0.715 0.723 0.675 0.669
2h 0.706 0.69 0.682 0.668 0.723 0.712 0.667 0.659
4h 0.713 0.692 0.676 0.67 0.724 0.704 0.664 0.64
6h 0.716 0.689 0.675 0.657 0.71 0.705 0.631 0.641

The Kingsci report shows that the stability of lutein itself to light and heat is not as good as that of lutein esters.