Origin & tradition
Gou Qi Zi (枸杞) has been used in Chinese medicine for over two millennia as a liver-and-kidney tonic associated with longevity and vision.
Eastern tradition · Tonic Berry
Goji (Lycium) 枸杞
The classic Chinese longevity berry, rich in polysaccharides and carotenoids studied for eye, immune, and oxidative health.
Why longevity buyers care
Key active: Lycium barbarum polysaccharides & zeaxanthin (botanical extract).
Lycium barbarum polysaccharides and zeaxanthin are studied for antioxidant defense, macular protection, and immune modulation; human trials cluster around eye health and metabolic markers.
Evidence summary
What the research actually says
72Evidence confidence
Human RCT evidence32 randomized controlled trials · 14 meta-analyses / systematic reviews
Human trials on eye/metabolic markers; longevity link mechanistic
Lycium barbarum polysaccharides and zeaxanthin are studied for antioxidant defense, macular protection, and immune modulation; human trials cluster around eye health and metabolic markers.
32registered clinical trials reference this intervention
3selected from 5+ PubMed papers (longevity / aging angle)
- Optimization of the extraction of bioactive molecules from Lycium barbarum fruits and evaluation of the antioxidant activity: a combined study
- Lycium barbarum polysaccharides promote longevity and healthspan in Caenorhabditis elegans via insulin/IGF-1 signalling and lipid metabolic remodelling
- Black goji berry anthocyanins extend lifespan and enhance the antioxidant defenses in Caenorhabditis elegans via the JNK-1 and DAF-16/FOXO pathways
Key active: Lycium barbarum polysaccharides & zeaxanthin (botanical extract) — a multi-compound botanical extract, so activity is not reducible to a single molecule.
According to PubMed and ClinicalTrials.gov: trial counts from ClinicalTrials.gov, peer-reviewed literature from PubMed. Counts auto-refresh weekly; last checked 2026-06-06. They include trials across many endpoints, not only longevity.
Informational only — not medical advice, a treatment claim, or a substitute for a qualified clinician. Evidence strength varies; we show mixed and null results on purpose.