Ashwagandha has moved from a traditional Ayurvedic ingredient to a mainstream supplement line in under a decade, and the specification language has not entirely caught up with the volume. Most disputes we see come from three ambiguities that can each be closed with one sentence in the purchase order.
Powder or extract: the first fork
Raw root powder is the milled root, nothing added and nothing removed. Its withanolide content is inherently low, generally a fraction of one percent, and that is not a defect, it is what root powder is. It is what traditional formulations, churnas and many capsule products actually use.
An extract is a concentrate, characterised by an extraction ratio and a standardised marker level. If someone offers you “root powder, 5% withanolides”, one of those two words is wrong. Establish which product you are buying before you compare a single price.
The method behind the percentage
This is where the order-of-magnitude gaps come from. Gravimetric methods measure a broad fraction of material that precipitates or partitions in a certain way, and report it as withanolide glycosides. They return generous numbers. HPLC quantifies named compounds against reference standards and returns lower, comparable ones.
Neither is dishonest, but they are not the same measurement, and a purchase order that says only “5% withanolides” does not say which one you are buying. Specify the method, and specify which markers are being summed.
Root-only or root-and-leaf
Leaf material is cheaper and carries a different withanolide profile from root. Traditional use, and many buyer and brand standards, are root-specific. Material blended with leaf can hit a headline withanolide number more easily and still fail a customer’s expectation of what they bought.
If you need root-only, write it in, and ask how it is verified, a chromatographic fingerprint and the marker ratio will show leaf material, and traceability back to the collection lot should support it. A supplier who cannot answer that question has answered it.
Check the destination market early
The permitted status of ashwagandha in food supplements is not uniform across markets. Some jurisdictions restrict it, others require particular warnings or conditions of use, and positions have shifted in recent years. Confirm the rules for every country you intend to sell into before you contract for annual volume, not after the first pallet lands. This is a labelling and market-access question, and it is entirely separate from product quality.
The rest of the specification
- Botanical name Withania somnifera, plant part, and origin region.
- For extracts: extraction ratio, solvent used, and residual solvent limits.
- Identity confirmation: a fingerprint method, not just a marker percentage.
- Moisture, total ash and acid-insoluble ash.
- Heavy metals, with lead worth particular attention in any root crop.
- Microbiology and the sterilisation method used to achieve it.
- Pesticide residues against the destination panel.
- Particle size, bulk density, allergen and GMO statements, shelf life and storage conditions.
Four questions for the supplier
- Is this root powder or an extract, and at what ratio?
- By which method is the withanolide figure determined, and which markers are summed?
- Is the material root-only, and how is that verified on a lot basis?
- Can I see a full Certificate of Analysis for a recent commercial lot, not a specimen?
A supplier who answers all four without hesitation is one you can build a programme with. The questions cost nothing and they filter the market quickly.
Our ashwagandha is WHO-GMP sourced with lot-specific withanolide testing. Request a sample and the full spec sheet.