Read the supplied material, not just the headline
EMA distinguishes the genuine extract from excipients added during manufacture in its herbal-medicinal-product guideline.[1] The useful buyer question is what the delivered material contains. Ask whether the specification describes the genuine extract, an extract preparation containing carrier, or a formulated liquid. Do not assume that an apparently dry powder is entirely botanical extract or that a carrier declaration describes every additional ingredient.
A carrier has a function as well as a mass
A spray-drying review describes carbohydrates, gums and proteins among encapsulation wall materials, and emphasizes compatibility with the compounds being encapsulated.[3] That is a technical rationale, not proof that a particular commercial powder is encapsulated. Ask which ingredient serves which function, when it is added, and whether the claimed function has been demonstrated for the offered grade. Avoid translating “carrier” automatically into either adulteration or improved performance.
Request a composition reconciliation
Prepare a composition checklist covering extract fraction, named carriers, other declared excipients and the basis of every percentage. Ask whether water or other volatiles are included in the reported mass fractions. If the figures do not reconcile, request a corrected statement rather than calculating an undocumented balance as “pure extract.” Preserve the supplier’s definitions alongside the numbers so future purchasing staff do not reinterpret them.
Keep composition and assay denominators together
For comparison, request an assay explicitly tied to the supplied preparation or to a clearly defined alternative basis. Ask whether the test sample was taken before or after carrier addition. A mathematical adjustment cannot demonstrate that a method recovers the analyte from the final matrix; ICH Q2 discusses accuracy under regular test conditions, including sample matrix and preparation.[2] Its pharmaceutical framework is a methodological reference here, not an automatic food requirement.
Application and label checklist
Ask the formulation team to review carrier identity, declaration basis, intended-use compatibility and any destination-specific labeling questions. Test the complete supplied powder rather than a carrier-free laboratory extract when evaluating dispersibility, flavor or sediment. If the carrier changes, record the old and new versions and agree which checks must be repeated. Neither “natural carrier” nor “carrier free” resolves these questions by itself.
Compare total value, not a carrier slogan
Use the reconciled composition, agreed assay basis and application results to compare candidate grades. Request a clear explanation when a quotation changes carrier loading but retains the same product headline. Keep the decision conditional if composition is undisclosed. This guide does not prescribe a carrier percentage, validate a label claim, or establish any ZL formulation, certificate, encapsulation technology or available grade.