Does Zeaxanthin Visual Performance Randomized Trial work?

The current Migaku evidence database contains 2 reusable source documents for Zeaxanthin Visual Performance Randomized Trial. This answer focuses on strength of evidence and what the studies can or cannot prove. - Results Across the 9 RCTs, lutein-containing supplementation significantly improved MPOD (Hedges' g = -0.589, p p = 0.001). [Wang WX (2026); evidence level 1] - Contrast sensitivity and serum lutein concentrations also improved significantly. [Wang WX (2026); evidence level 1] - Conclusion Lutein-based supplementation is associated with measurable structural and functional visual benefits in early-stage AMD. [Wang WX (2026); evidence level 1] - Purpose To quantify the effects of lutein-containing supplementation on structural and functional visual outcomes in patients with age-related macular degeneration (AMD), with particular focus on disease stage and treatment exposure. [Wang WX (2026); evidence level 1] - This systematic review aimed to evaluate randomized controlled trial (RCT) evidence on the effects of carotenoids, anthocyanins, polyunsaturated fatty acids, and combined nutraceutical formulations on refractive outcomes, axial length, macular pigment optical density (MPOD), visual function, and symptoms of visual fatigue. [Martinez-Perez C (2025); evidence level 1] Evidence levels are sorting aids, not final clinical grades. Level 1 usually indicates systematic-review style evidence, level 2 indicates randomized trials or public-health guidance, and lower levels need more cautious wording. This page is educational. People with medical conditions, pregnancy, medication use, or unusual symptoms should ask a qualified clinician before changing supplements, medication, or treatment routines.