Lutein & Zeaxanthin for Age-Related Cognitive Decline
CA 6-month RCT showed macular xanthophylls increased serum BDNF, reduced IL-1beta, and improved composite memory, psychomotor speed, and sustained attention. Macular pigment optical density correlates with cognitive performance.
The Bottom Line
A 6-month RCT showed macular xanthophylls increased serum BDNF, reduced IL-1beta, and improved composite memory, psychomotor speed, and sustained attention. Macular pigment optical density correlates with cognitive performance.
Key Study Findings
Population: Community residents without dementia aged >=60 years
Population: In vitro BBB model and stability tests
Population: systematic review of carotenoids for antiaging (nutraceutical, pharmaceutical, cosmeceutical)
Population: Community-dwelling older adults aged 65+
Population: None
Population: Adults, mean age 38.6, 70% female
Key Statistics
8
Studies
600
Participants
Positive
Grade
Referenced Papers
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
Commonly Used Dosages
- general:
- 10-20 mg lutein + 2-4 mg zeaxanthin/day
- cognitivesupport:
- 12 mg lutein + zeaxanthin/day
Upper limit: Not established; 20 mg/day well-tolerated
Dosages Studied in Research
| Dosage | Duration | Effect | N |
|---|---|---|---|
| >=112 mg/day vs <112 mg/day | 270 weeks | Positive | 1550 |
| None | -- | Positive | -- |
| None | -- | Positive | -- |
| None | -- | Positive | 72 |
| None | -- | Mixed | -- |
| None | -- | Positive | 60 |
| None | 156 weeks | Positive | 442 |
| MIND, Mediterranean, DASH, HEI-2015 diets | -- | Positive | -- |
Best taken: With meals containing fat
Safety & Side Effects
Reported Side Effects
- ⚠ Generally very well-tolerated
- ⚠ Mild skin yellowing at very high doses (carotenodermia, harmless)
Known Interactions
- ● Orlistat (reduces carotenoid absorption)
- ● Cholesterol-lowering drugs (may reduce absorption)
Tolerable upper intake: Not established; 20 mg/day well-tolerated
Always consult your healthcare provider before starting any supplement.
Frequently Asked Questions
Does Lutein & Zeaxanthin help with Age-Related Cognitive Decline?
How much Lutein & Zeaxanthin should I take for Age-Related Cognitive Decline?
Are there side effects of Lutein & Zeaxanthin?
How strong is the evidence for Lutein & Zeaxanthin and Age-Related Cognitive Decline?
Related Evidence
Other ingredients for Age-Related Cognitive Decline
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.