The Claim

Daily supplementation with 6 mg of lutein from marigold extract for 15 days increases serum lutein concentrations by approximately 2.4-fold in healthy normolipemic adults aged 20–65, regardless of whether the lutein is provided in free or ester form, and these elevated levels are maintained for at least two months.

Source: Bioavailability of Lutein from Marigold Flowers (Free vs. Ester Forms): A Randomised Cross-Over Study to Assess Serum Response and Visual Contrast Threshold in Adults

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
68score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Quantitative
1 study reviewed
In plain English

Taking 6 mg of lutein from marigold extract daily for 15 days raises lutein levels in the blood by about 2.4 times in healthy adults aged 20–65, whether the lutein is free or bound, and these higher levels stay elevated for at least two months.

See the scientific wording

Daily supplementation with 6 mg of lutein from marigold extract for 15 days increases serum lutein concentrations by approximately 2.4-fold in healthy normolipemic adults aged 20–65, reaching levels of 0.81–0.90 µmol/L, regardless of whether the lutein is provided in free or ester form, and these elevated levels are maintained for at least two months.

Why this might work

When lutein is eaten, whether it's attached to fat or not, the body breaks off the fat part in the gut, dissolves the lutein into tiny fat droplets, absorbs it into the gut cells, packs it into fat-carrying particles, sends it through the lymph system to the liver, and then releases it into the blood where it circulates with other fat particles until it builds up to a steady level in the bloodstream.

Verified mechanismbased on 1 study

What the research says

1 study

  1. Study: Bioavailability of Lutein from Marigold Flowers (Free vs. Ester Forms): A Randomised Cross-Over Study to Assess Serum Response and Visual Contrast Threshold in Adults

    Taking 6 mg of lutein daily from marigold supplements for two weeks doubles the amount of lutein in your blood, whether it's in its natural form or chemically attached to fats—and that higher level stays high for at least two months, according to this study.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

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Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.