Lycium barbarum (goji berry extract, standardised)
What it is
Goji berry has been used in TCM for thousands of years as a liver and kidney yin tonic for eye health and longevity. Contains zeaxanthin dipalmitate, a highly bioavailable carotenoid. The Li et al. 2021 RCT (Nutrients, 27 healthy adults, 28 g/day dried goji berries for 90 days) found significantly increased macular pigment optical density and skin carotenoid scores. Extract forms standardise the active carotenoids.
Dose
15–30 g/day dried berries or 500–1,000 mg/day standardised extract; rich in zeaxanthin dipalmitate
Time of day & tips
Can be eaten as dried berries (traditional) or taken as standardised extract. Take with a fat-containing meal for carotenoid absorption. Very safe as a food. Avoid concentrated extracts if on warfarin — mild anticoagulant activity.
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