Evidence gradeB
ImpactSmall
Confidencemedium
Imported rating. This grade comes from SuppCo and has not been independently reviewed. It describes research, not a product, and it is not medical advice.
The rating
- Direction
- Favourable
- Rated by
- SuppCo
- Observed
- 28 September 2026
Studies behind it
Dietary Lutein and Cognitive Function in Adults: A Meta-Analysis of Randomized Controlled TrialsJeffrey Li · Molecules2021Effects of Lutein and Astaxanthin Intake on the Improvement of Cognitive Functions among Healthy Adults: A Systematic Review of Randomized Controlled TrialsR. Nouchi · Nutrients2020A possible role for lutein and zeaxanthin in cognitive function in the elderly.Elizabeth J Johnson · The American journal of clinical nutrition2012