Goji berry (Lycium barbarum)

Tier 3 — weak evidence · Polysaccharide · Eye health · Antioxidant

Dried berry containing zeaxanthin, lutein, and Lycium barbarum polysaccharides (LBP). Small RCTs show retinal pigment density improvement and modest antioxidant biomarker changes. Caution with warfarin (multiple case reports of INR elevation) and CYP2C9 substrates.

Dose: 15-30 g dried berries OR 5-10 g LBP-standardised extract