Skip to content
SupplyList
Menu

Fisetin

Fisetin suppliers and sourcing guide

Fisetin is a flavonol (3,3',4',7-tetrahydroxyflavone), a yellow pigment found in strawberries, apples and onions and at much higher levels in the wood of trees such as the Japanese wax tree (Rhus succedanea) and smoke tree (Cotinus coggygria). Commercial fisetin is extracted from these woods with solvents and purified, usually to 98%, or made by synthesis. Brands buy a yellow powder for capsules, often in modest volumes.

See suppliersWhat to ask for on the COA
Also known as
3,3',4',7-Tetrahydroxyflavone · Cotinin · Fisetol
Facts checked
November 2026

Forms and grades of fisetin

Suppliers sell different products under the same name. Specify the one you need.

  • Fisetin 98%

    Purified fisetin powder, the standard grade for capsules.

  • Lower-standardized extracts

    Plant extracts standardized to a lower fisetin percentage, such as 50%, with other plant compounds present.

  • Dispersible and lipid-based forms

    Fisetin combined with carriers such as fenugreek fiber or phospholipids to change dispersibility, at a lower fisetin content per gram.

What to check on the COA

Compare each result with your own specification when the lot arrives.

Assay (HPLC)
Fisetin content by HPLC against a reference standard.
Identity
HPLC retention time and UV spectrum, or HPTLC for plant extracts.
Loss on drying
Moisture content, which affects the assay basis.
Residual solvents
Solvents from extraction and purification against USP <467> or the buyer's limits.
Heavy metals
Lead, arsenic, cadmium and mercury by ICP-MS.
Microbiology
Total plate count, yeast and mold, and pathogens.

Storage, lots and expiry

Storage and shelf life

Keep fisetin sealed in light-resistant containers in a cool, dry place. Shelf life and retest dates come from the supplier's specification.

Lots and expiry dates

Record the fisetin assay for each lot and the plant source if the supplier states it. Color can vary somewhat between lots and is not a reliable guide to purity.

Regulatory status

Facts from regulators and standards bodies, each linked to its source.

This is general information, not regulatory advice. Status differs by country and by how the ingredient is used, so check the rules for your product and market.

Fisetin suppliers

Manufacturers and distributors whose own websites say they sell it.

We are checking fisetin suppliers now

Every listing is checked against the supplier’s own website before it goes live, so this list fills in over the coming weeks. The specs and COA checklist above are ready today.

Sell fisetin? Request a listing

Frequently asked questions

What forms of fisetin can brands buy?

Common forms include fisetin 98%, lower-standardized extracts and dispersible and lipid-based forms. Ask each supplier for the specification sheet of the exact grade they quote.

What should the COA for fisetin include?

Expect assay (HPLC), identity, loss on drying, residual solvents, heavy metals and microbiology, each with its method, specification and result for that lot.

How should fisetin be stored?

Keep fisetin sealed in light-resistant containers in a cool, dry place. Shelf life and retest dates come from the supplier's specification.

What is the regulatory status of fisetin?

Health Canada's Natural Health Products Ingredients Database classifies fisetin as a natural health product under Schedule 1, item 2 (an isolate), with the stem of Rhus succedanea as a source material. A Health Canada natural health product monograph also lists synthetic fisetin as a medicinal ingredient.

More specialty nutrients

All 77 specialty nutrients

Sell ingredients to brands?

Request a free listing for the ingredients you make or distribute. No paid placement.

Request a listing