Wholesome in bulk™ Ginkgo Biloba Leaf Extract Powder
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Bulk Ginkgo Biloba Leaf Extract for Supplement Manufacturing
Ginkgo biloba extract is a dry powder made from the leaves of Ginkgo biloba L., the maidenhair tree. The common grade is 24/6: at least 24% flavone glycosides and 6% terpene lactones, both measured by HPLC. We supply it in bulk to supplement brands, contract manufacturers, and formulators.
A leaf extract with two measured marker groups
Ginkgo leaf extract is specified by two groups of compounds, each with its own HPLC assay. Add limits for ginkgolic acids, rutin, and quercetin, and your quality team can compare lots and suppliers on the same terms.
Two marker groups
Flavone glycosides (also called flavonol glycosides) and terpene lactones are the markers most specifications name. Terpene lactones include ginkgolides A, B, and C plus bilobalide, and they are characteristic of ginkgo leaf.
The 24/6 standard grade
The most widely listed grade is 24% flavone glycosides with 6% terpene lactones. Buyers often write it as 24/6 on quote requests and purchase orders.
A pharmacopeial reference
The USP monograph for Powdered Ginkgo Extract sets flavonol glycosides at 22.0 to 27.0%. It also caps rutin at 4% and free quercetin at 0.5%, which helps confirm the flavonoids come from ginkgo leaf.
Fine, free flowing powder
Spec sheets describe a light brown to brownish yellow powder with a bitter taste. Most call for NLT 95% through an 80 mesh screen, which suits capsules, tablets, and dry blends.
Water and ethanol extraction
Standard extracts are made with water and ethanol, then refined and dried to a powder. Published spec sheets set residual ethanol at NMT 5,000 ppm by gas chromatography.
Single run identity check
A single HPTLC run can confirm ginkgo leaf identity and screen the rutin and quercetin bands at the same time. Published work found it agreed with the USP HPLC limit tests in 98% of cases.
Where formulators use ginkgo biloba extract
This extract fits measured formats where fill weight and serving size are controlled, including:
- Capsules
- Compressed tablets
- Softgels, after suspension and stability trials
- Multiple ingredient botanical blends
- Stick packs and sachets
- Powdered drink mixes, after taste trials
- Private label programs
Plan fill weights from the confirmed assay on each COA. A 24/6 extract and plain ginkgo leaf powder are not interchangeable gram for gram, so recalculate your serving math whenever you change grade or form.
What to check before you buy ginkgo biloba extract
Two powders sold as 24/6 can differ in plant part, flavonoid profile, ginkgolic acid content, and carrier. Review these points together, and ask for lot documents before you approve a supplier.
Species and plant part
Confirm Ginkgo biloba L. leaf on both the specification and the certificate of analysis (COA). Leaf powder and refined leaf extract are different materials with different specs.
Identity by HPTLC
An HPTLC fingerprint against a ginkgo reference extract confirms identity. The same plate shows whether bands from other flavonoid sources, such as Japanese pagoda tree (Styphnolobium japonicum) fruit or buckwheat herb, are present.
Rutin and quercetin limits
Ask for rutin and free quercetin results by HPLC. The USP monograph caps them at 4% and 0.5%. Results inside those limits are a good sign the flavone glycoside figure comes from the leaf itself.
Ginkgolic acid limit
Ginkgolic acids are natural leaf compounds that refined extracts hold to a ppm limit. Published supplier specs range from NMT 5 ppm to NMT 10 ppm. Ask for the HPLC result on every COA.
Solvent, ratio, and carrier
Confirm the extraction solvent and native extract ratio. Ask whether any carrier, such as maltodextrin, is added to reach the stated grade.
Contaminant limits
Check heavy metals by ICP-MS, microbial limits by USP methods, pesticide residues, and residual solvents. Compare each limit with your own finished product specification.
Label math: If your label lists flavone glycosides or terpene lactones per serving, base the figures on each lot's measured assay. Confirm them with your own finished product testing. A stated grade is a minimum, so the measured value on the COA is the figure to work from.
Typical specification for ginkgo biloba extract
These values reflect the common 24/6 grade. Final figures come from the specification sheet and COA for your lot. NLT means not less than, NMT means not more than, and ppm means parts per million.
| Parameter | Specification | Method |
|---|---|---|
| Botanical source | Ginkgo biloba L., leaf | HPTLC fingerprint |
| Appearance | Fine light brown to brownish yellow powder | Visual |
| Flavone glycosides | NLT 24.0% | HPLC |
| Terpene lactones | NLT 6.0% | HPLC |
| Ginkgolic acids | NMT 5 ppm | HPLC |
| Rutin | NMT 4.0% | HPLC |
| Free quercetin | NMT 0.5% | HPLC |
| Extraction solvent | Water and ethanol | Supplier declaration |
| Carrier | None, or as named on the specification sheet | Supplier declaration |
| Particle size | NLT 95% through 80 mesh | USP <786> |
| Loss on drying | NMT 5.0% | USP <731> |
| Bulk density | 0.30 to 0.70 g/mL | USP <616> |
| Lead | NMT 2.0 ppm | ICP-MS |
| Arsenic | NMT 1.0 ppm | ICP-MS |
| Cadmium | NMT 1.0 ppm | ICP-MS |
| Mercury | NMT 0.1 ppm | ICP-MS |
| Total aerobic count | NMT 1,000 cfu/g | USP <2021> |
| Yeast and mold | NMT 100 cfu/g | USP <2021> |
| E. coli and Salmonella | Negative in 10 g and 25 g | USP <2022> |
| Residual ethanol | NMT 5,000 ppm | GC headspace, USP <467> |
Storage and handling for bulk ginkgo extract
Leaf extracts hold their color and assay when they stay sealed, dry, and out of light. These habits help you keep quality steady across several production runs.
Keep it sealed
Close the inner liner after each use and press out the air. Extract powders pick up moisture from the air and can cake when left open.
Store cool and dry
Keep bags off the floor in a dry room, away from heat sources. Follow the temperature range on the spec sheet.
Keep away from light
Leave the powder in its original opaque packaging. Light and heat can shift color and assay over time.
Rotate stock
Record the lot number and retest date for each bag. Send older lots to production first, within the shelf life on the COA.
Ginkgo biloba extract buyer FAQ
Quick answers to the questions procurement and quality teams ask most.
What does 24/6 mean for ginkgo extract?
24/6 means the extract contains at least 24% flavone glycosides and at least 6% terpene lactones. Both figures are measured by HPLC. It is the most widely listed grade for bulk ginkgo leaf extract.
What ginkgolic acid limit should I ask for?
Ask for a ginkgolic acid limit in parts per million, measured by HPLC, on every COA. Published supplier specs range from NMT 5 ppm to NMT 10 ppm. Match the limit to your own finished product specification.
How do you confirm ginkgo identity?
An HPTLC fingerprint compared with a ginkgo reference extract confirms identity. Pair it with HPLC results for rutin and free quercetin, which the USP monograph caps at 4% and 0.5%. Together they show whether the flavonoid profile matches ginkgo leaf.
Is ginkgo extract the same as ginkgo leaf powder?
No. Leaf powder is dried, milled leaf. Extract is made by steeping the leaf in water and ethanol, then refining and drying the liquid to reach a stated assay. Extract is the usual choice when a label needs a standardized amount.
What documents can I get with an order?
A certificate of analysis (COA) and a specification sheet ship with every order. An allergen statement and a safety data sheet may also be available, depending on the lot in inventory. Contact us to request them.
Can I get a sample before a bulk order?
You can request one by choosing sample options on the quote form. We will confirm availability, size, and timing.
How should I store an opened bag?
Close the liner, press out the air, and keep the bag in a cool, dry place away from light. Use the powder within the shelf life shown on the COA.
Request a quote for bulk ginkgo biloba extract
Tell us your grade, ginkgolic acid limit, quantity, and timing. We will reply with current pricing. Select testing documents and sample options on the quote form.
Order Ginkgo Biloba ExtractBulk orders: Choose a pack size above, or use the quote form for larger volumes, testing documents, and sample options. We serve supplement brands, contract manufacturers, product developers, and formulators.
This bulk ingredient is sold for further manufacturing and formulation. The information on this page describes the ingredient and how commercial buyers evaluate it. It is not medical advice. Each finished product brand is responsible for its own labeling and product claims.
