Frequently asked questions

We are a contract manufacturing partner, and we are explicit about which role applies to each line rather than blurring them.

For bulk raw materials we operate qualified supply programmes: we specify, audit and release the material, and we tell you plainly when we are the producing site and when we are not. For finished products we act as your turnkey manufacturing partner — we develop the formulation and manage the production run under cGMP in an FDA-registered facility through our certified partner network, under our specification, our batch documentation and our release testing.

What you get either way is a single accountable party holding the specification, the documentation and the lot traceability.

It means you own the product and we run the project that produces it. You bring a formula, a competitor sample you want matched, or simply the label claim you want to make. We develop the formulation, manage production under cGMP in an FDA-registered facility through our certified partner network, arrange the testing, then pack and label the finished goods under your brand.

You control the actives and their doses, the dose form, the pack format and the artwork. We control the specification, the qualification of every input, the batch records and the release documentation. The finished goods are yours outright — there is no Zenith branding on them and no restriction on where you sell them.

Yes. The catalogue reflects what we hold and run most often, not the limit of what we can make. If you need an active, blend or dose form not listed, send the brief. We will confirm feasibility, source the material through our qualified supplier network, and quote the development and production timeline.

Most powdered ingredients start at 25 kg. Higher-value standardised extracts start lower, often at 5 kg, and packaging components are sold by the carton. Qualified buyers evaluating a material can request a paid sample of 100 g to 1 kg before committing to a full order.

Yes, and it is the most reliable way to start. Send the specification sheet, target assay, mesh requirement and any Certificate of Analysis from your current supplier. We will confirm in writing whether we can meet it, propose the closest achievable alternative if we cannot, and send a sample against the agreed spec.

Yes. Every lot ships with a lot-specific Certificate of Analysis showing identity, assay, heavy metals, microbiological results and residual solvents where relevant. Safety Data Sheets, allergen statements, and Kosher and Halal certificates are available for every product on request.

Certain lines are. Our USP-grade activated charcoal and acid-washed carbons are produced to pharmacopoeial specification and are used by pharmaceutical manufacturers. Most other products are food and supplement grade. Always confirm the required grade when requesting a quote, as the grade determines both specification and price.

Keep sealed in the original container in a cool, dry place below 25°C, away from direct light. Hygroscopic materials such as allulose and freeze-dried organ powders should be resealed immediately after sampling. Typical shelf life is 24 months for powders and 36 months for activated carbon, both from the manufacture date on the label.

Materials held in US stock ship within 3–7 business days of a cleared order. Made-to-order production, custom blends and contract manufacturing runs take 3–5 weeks depending on the dose form and component lead times. Samples usually go out within 48 hours.

Yes. We ship worldwide by air and sea freight on FOB, CIF and DDP terms. Export documentation, certificates of origin and phytosanitary paperwork are prepared as the destination requires. Domestic US orders move by parcel or LTL freight.