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Zeaxanthin

Zeaxanthin

Best for

Protect against macular degeneration

Large effect, needs confirmation · 10–20 mg/day for 13–104 weeks · 1 meta-analysis , n=16

10 papers · 3 claims · 6 outcomes scored · 2 positive

Outcomes

What zeaxanthin actually does, by outcome

Each row is one outcome with effect size, evidence base, the dose that worked in trials, and time to first effect. Magnitude tiers come from native-unit MCID where available, Cohen's d otherwise.

Outcome Effect Evidence Dose Weeks Rank
Protect against macular degeneration Large effect, needs confirmation
large 		4 meta-analyses n=16 Meta-analyzed 10–20 mg 13–104 wk #2/6
Build eye-protective pigment stores Likely benefit
moderate 		7 RCTs n=210 0.4873–24 mg 2–104 wk #1/5
Raise protective carotenoid levels Not enough research
1 RCT n=— 5 g 4 wk —
Buy well

Recommended Zeaxanthin products

Real products that dose Zeaxanthin where the research does, in a clean formulation, from brands we've audited. We only list ones we'd stand behind.

Chosen for adequate Zeaxanthin dosing vs. the studied range, a clean formulation (grade A–C), and independent brand-quality audits. Not sponsored.

Risk profile

Adverse events and known drug interactions

Safety events

adipose tissue discoloration (yellow/orange)
feces discoloration (orange-yellow)
reduced mating index
reduced pup weight gain during lactation
Crystalline maculopathy / retinal crystals

Drug interactions

Antineoplastic Agents moderate increases effect

Co-studied with

Supplements that share evidence with zeaxanthin

Sources

  1. 1. Overall skin tone and skin-lightening-improving effects with oral supplementation of lutein and zeaxanthin isomers: a double-blind, placebo-controlled clinical trial. (2016) ↑
  2. 2. Macular carotenoid supplementation improves disability glare performance and dynamics of photostress recovery. (2016) ↑
  3. 3. MACULAR PIGMENT DISTRIBUTION RESPONSES TO HIGH-DOSE ZEAXANTHIN SUPPLEMENTATION IN PATIENTS WITH MACULAR TELANGIECTASIA TYPE 2. (2017) ↑
  4. 4. Effects of Mixed Carotenoids on Adipokines and Abdominal Adiposity in Children: A Pilot Study. (2017) ↑
  5. 5. Eggs Improve Plasma Biomarkers in Patients with Metabolic Syndrome Following a Plant-Based Diet-A Randomized Crossover Study. (2022) ↑
  6. 6. 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. (2024) ↑
  7. 7. A double-blind, placebo-controlled study on the effects of lutein and zeaxanthin on neural processing speed and efficiency. (2014) ↑
  8. 8. Effect of Antioxidant Supplementation on Macular Pigment Optical Density and Visual Functions: A Systematic Review and Network Meta-Analysis of Randomized Controlled Trials. (2024) ↑
  9. 9. Impact of daily Chlorella consumption on serum lipid and carotenoid profiles in mildly hypercholesterolemic adults: a double-blinded, randomized, placebo-controlled study. (2014) ↑

Generated August 14, 2026

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