Oz Ginkgo Biloba
Nootropics
Overview
- Oz Ginkgo Biloba is a standardized botanical extract derived from the leaves of Ginkgo biloba L., a living fossil tree native to East Asia.
- The supplement is formulated to deliver a standardized concentration of flavonoid glycosides and terpene lactones.
- Its primary purpose is to support brain health and circulatory function in adults seeking to maintain cognitive performance and vascular tone.
Chemistry
- The active fraction of Oz Ginkgo Biloba is a standardized extract containing:
- Flavonoid glycosides (quercetin-3-O-glucoside, kaempferol-3-O-glucoside)
- Terpene lactones (ginkgolide A, B, C, bilobalide)
- Ginkgolides are sesquiterpene lactones with a unique bicyclic ring system (C₁₉H₂₄O₅ for ginkgolide A, IUPAC: (2S,3R,4S,5R,6S)-5,6-dihydroxy-3-(2-hydroxymethyl-5-hydroxy-4-methoxy-1-oxo-2-pyrrolidinyl)-4-methyl-2-pyrrolidine).
- Bilobalide is a sesquiterpene lactone with formula C₁₅H₁₈O₈ (IUPAC: 4-(2-hydroxy-2-methylpropyl)-2-methyl-6-hydroxy-5-oxo-2-pyrrolidine).
- The standardized extract typically contains:
- 24 % flavonoid glycosides (expressed as quercetin equivalents)
- 6 % terpene lactones (ginkgolides A–C and bilobalide)
- The extract is water-ethanol-based, standardized to a minimum of 2.5 % ginkgolic acids (often reduced to <5 ppm) to minimize allergenic potential.
Sources & Quality
- Oz Ginkgo Biloba is sourced primarily from mature Ginkgo biloba trees cultivated in China (Shandong, Zhejiang provinces) and Korea.
- Leaves are harvested in late autumn when flavonoid concentrations peak.
- Leaves are dried at ≤40 °C to preserve thermolabile constituents.
- Extraction employs a 50 % ethanol-water mixture under controlled temperature (60 °C) and vacuum.
- The extract is purified by resin-based chromatography to achieve the 24 %/6 % standardization.
- The extract is tested for heavy metals, pesticide residues, and microbial load per USP <795> guidelines.
- High-quality manufacturers employ:
- GMP-certified facilities
- Batch-to-batch HPLC fingerprinting
- Third-party certification (e.g., USP, NSF) to ensure consistency and safety.
Where to Buy Oz Ginkgo Biloba
Affiliate Disclosure: We earn a commission if you purchase through these links at no additional cost to you. This helps us maintain our research and provides you with the best supplement information.