Fisetin suppliers: grades & sourcing evidence
A flavonol sold as a smoke-tree extract or, in other cases, as a synthetic. Fruit fisetin and a 98% powder are not the same article.
Fisetin is a flavonol. It occurs at low levels in some fruits and vegetables, including strawberries. Those food levels are not a commercial extract specification. High-percentage powders on the ingredient market are commonly described as Cotinus coggygria (smoke tree) extracts from wood, branch, or leaf, or they are synthetic.
Species, plant part, and process decide whether two fisetin ingredients can be compared. A 98% HPLC powder, a 50% extract, and a synthetic fisetin are different articles. Ethanol, acetone, and resin-purification steps are not the same process as a water-only extract, and a supplier’s example table is not a lot COA.
A line that says country of origin China, printed on an undated example, does not show the county where the trees grew or which building manufactured the lot.
Public database references
Reference molecules describe chemical identity, not the composition, purity, origin, or safety of a supplier’s extract. These automated lookups do not change supplier rankings.
- fisetin — PubChem CID 5281614
C15H10O6 · 286.24 g/mol · Retrieved 2026-11-15
FDA food recall keyword screening
Search terms: fisetin. 0 matching recall records in the available dataset, including historical and terminated recalls. Retrieved 2026-11-15.
Matches can include finished foods and multi-ingredient products. They do not establish that this ingredient caused a recall or that any listed supplier was involved. No matches does not mean an ingredient or supplier is safe.
View the FDA query and source recordsSpecifications
- Botanical source
- Cotinus coggygria Scop. is the species named on commercial smoke-tree fisetin pages reviewed for these pages.
- Synthetic fisetin is outside the plant-extraction scope even when the molecule is the same.
- Plant part
- Branch, trunk, wood, bark, and leaf are all claimed in the trade. They are not interchangeable plant parts. The specification for the grade has to name one.
- Common grades and distinctions
- Extract percentage and whether the assay is HPLC.
- Plant part used for that percentage.
- Solvent and any carriers left in the powder.
- Plant extract versus synthetic.
Listing status
No confirmed offering is listed. A confirmed row needs evidence of plant extraction, Chinese cultivation, Chinese manufacturing, and a manufacturing site tied to that grade.
Confirmed comparison
Confirmed offerings are plant-extracted, with reviewed evidence of Chinese cultivation, Chinese manufacturing, and an identified manufacturing site for that grade. Sorted by the exact transparency score, then by supplier and grade name.
No offering is in the confirmed ranking. A row is added only when the evidence covers that grade. An empty table is not a claim that no manufacturer exists.
Sample and quote requests stay closed until a confirmed offering is listed. You can still tell CleanIngredients what you need.
Buying considerations for US supplement brands
- Ask for the species, the plant part, and the solvent system on a product-specific specification, not a catalogue sentence that also offers unrelated extracts.
- Treat “country of origin: China” as incomplete until cultivation region and manufacturing site are separate evidenced fields.
- An example COA without a lot number scores as a generic example. It does not show that every lot is tested.
- If a company names two factories, ask which one makes this grade. Do not assume every product is made at the address in the footer.
Synthetic fisetin and fermentation routes are out of scope.
No fisetin offering is in the confirmed ranking.
Buying guides and tools
Bulk fisetin powder: sourcing and sample checklist
Evaluate bulk fisetin powder offers for botanical origin, production route, assay basis, lot evidence, sample consistency, and commercial terms.
Plant-extracted vs synthetic fisetin: buyer checks
Check fisetin manufacturing-route claims with botanical source, plant part, process, and lot traceability before evaluating a supplier.
Fisetin 98% powder specification: purchasing checklist
Evaluate a fisetin 98% powder claim with assay basis, identity, process, solubility questions, and a lot-matched document package.
Compare supplier evidence Compare cost per active gram · Calculate landed cost · Build an RFQ
Manufacturer evidence to review before a quote
Compare the legal seller and actual plant, the exact grade and assay basis, botanical growing origin, manufacturing origin, and sample-lot documents separately. A company description is not confirmation of a grade or available stock.
No additional supplier lead meets the evidence threshold for this section yet. The source review below records the research available so far.
Sources and method
Evidence reviewed 2026-11-14. Methodology 2026-11-14.1.
Bulk Fisetin Powder product pageGuanjie Biotech · checked 2026-11-14
COA table, Basic Product Information. Open the source
Genus and Species: Cotinus coggygria Scop. Part of the Plant: Branch. Country of Origin: China.
The page names smoke tree, branch, and China, and it describes an ethanol extraction and resin purification. The COA-style table shows a single HPLC result and the word Conform. No lot number or report date is published there, so it is an example table, not a public lot-specific COA. The contact block gives Building 2, QinChuang Chang’an Industrial Park, Chang’an District, Xi’an, and the page also says the company has two factories. That does not show this fisetin grade is made in that building, or where the trees were cultivated. The offering is not listed.