Full profile
| Also known as | Macular carotenoids |
|---|---|
| Best for | Processing speed · Sustained attention |
| Evidence grade | Grade B — Moderate — several human trials, some mixed results |
| Studied dose range | 10–14 mg lutein + 2–3 mg zeaxanthin/day (the Lutemax 2020 studied ratio). |
| Time to effect | Carotenoids accumulate in tissue gradually; studies generally run 4+ months. |
| Best form | Lutemax 2020 or an equivalent marigold-derived extract with a stated lutein:zeaxanthin ratio. |
| Food sources | Leafy greens (kale, spinach), Egg yolks, Corn, Orange peppers |
Evidence, honestly graded
Stringham 2019 (Physiol Behav) gave Lutemax 2020 to healthy adults aged 18–25 and found improved processing speed and attention along with higher serum BDNF versus placebo; Bovier & Hammond 2015 (PMC4176961) separately linked macular pigment density to faster visual processing speed. Capped at B for two honest reasons: most of the positive human trial base is OmniActive-funded (the branded-ingredient maker), and "processing speed" in these trials is partly a visual-processing measure, not a pure cognition-only endpoint.
See the full grading rubric — study type, replication, population match, and dose adequacy — in The Evidence Standard.
Side effects
- Very safe
- Carotenodermia (a yellow-orange skin tint) at high chronic doses — cosmetic and reversible
Interactions
- No material known interactions
Stacks well with
- Omega-3 (fat-soluble carotenoids absorb better with dietary fat)
What to look for on a label
- State the lutein and zeaxanthin amounts separately, not a combined "carotenoid" total.
- Take with a fat-containing meal — these are fat-soluble.
References
- Stringham 2019, Physiological Behavior — Lutemax 2020 RCT. Healthy adults 18–25; Lutemax 2020 improved processing speed and attention measures and raised serum BDNF versus placebo. OmniActive-funded; educational, not a product claim.
- Bovier & Hammond 2015 — macular pigment and visual processing speed. Linked macular pigment optical density to faster visual processing speed in young healthy adults. PMC4176961. Educational.
Primary citations for some entries above are still being compiled; those without a linked identifier are editorial summaries of the wider literature.
Grades and studied doses are our conservative reading of the human research, shown for education. They are not product claims, and a studied dose is not a recommended dose.
See how Lutein + Zeaxanthin compares on grade, dose, and goal in the Evidence Explorer.