Lutein and Humans

What is the RDA for lutein?

What does lutein do?
helps the retina and the brain (video at 0:46)
Lutein crosses the blood-brain barrier (video at 1:03)
As part of a vitamin formula, 10 mg of lutein may help delay progression of AMD. (2)
help prevent cataracts (3)
improve cognitive performance (3)
helps preserve and boost brain activity (3)
improves memory (3)
learning efficiency (3)
verbal fluency (3)
protects human skin cells from UV sun damage (3)
may improve skin tone and slow signs of aging (3)
may support healthy blood vessels (4)
may lower cancer risks (4)
may improve cardiovascular health (4)
A daily supplement of 20 mg of lutein for 3 months was associated with a decrease in cholesterol and trigylceride levels, both of which are known risk factors for heart disease. (5)
lutein and zeaxanthin found in the retina can help absorb blue light (11)

Where is lutein located in the human body?
Lutein is concentrated in the retinas of the eyes. (4)

Can the human body xynehtize its own lutein?
No, the human body cannot synthesize its own lutein. (4)


How to improve lutein absorption in the human body?
Eating lutein with fat can improve absorption in the human body because lutein is fat-soluable. (3)

Other components in an avocado are particularly effective in the enrichment of neural lutein. The most likely components are monounsaturated fatty acids. (7)

How can a person increase lutein levels? 
A daily avocado consumed for six months raised lutein levels in plasma and in the macular in the eye, which is a biomarker for lutein levels in the brain. (6)

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