How to source corn peptide (75% peptides)
What we establish before quoting a corn peptide order. Most corn peptide enquiries quote a single percentage, so the first thing we settle is the assay basis: 75% peptides is our standard grade, and a sheet written against a different basis cannot be compared against it. We then ask which application the powder is going into, because liver-support oral liquids and recovery beverages pull the mesh and the solubility in a different direction from tablets, lozenges and functional foods, and we would rather confirm that with our manufacturing partner before quoting than send a sheet the buyer cannot use. Packing comes next: a 25 kg fibre drum as standard, foil bags for pilots, OEM under the buyer's own brand if needed. Samples are drawn from production lots, so what the buyer tests is the material that would ship; the free quantity depends on the item's value and anything beyond is billed at cost plus courier, quoted up front.
Corn peptide is one of those ingredients where three suppliers' sheets can look identical and still describe different materials, because the market quotes a single peptide percentage without saying what it is measured against. The standard grade is corn peptide at 75% peptides, made from non-GMO corn (zein) protein by enzymatic hydrolysis, separation and spray drying — a high-alanine/proline peptide favoured in liver-support and hangover-recovery formulations. This guide covers how to source corn peptide: what the material is, the specification line by line, the applications it is bought for, and what a first order looks like.
What corn peptide is
The source line on the sheet reads non-GMO corn (zein) protein, and the process line reads enzymatic hydrolysis, separation and spray drying. The assay line reads 75% peptides. The result is a pale cream to light-yellow fine powder, water-soluble with a clean taste, which is what makes it workable in oral liquids and beverage bases rather than only in tablets. The same material also circulates in the market as corn oligopeptide powder; on our sheet it is the same 75% peptide grade either way. If your process handles a different peptide assay, tell us before comparing quotations, because the assay basis is the first thing that makes two sheets comparable.
The corn peptide specification, line by line
| Line | Standard grade |
|---|---|
| Source | Non-GMO corn (zein) protein |
| Process | Enzymatic hydrolysis, separation and spray drying |
| Assay — peptides | 75% |
| Appearance | Pale cream to light-yellow fine powder |
| Odour & taste | Characteristic |
| Particle size | 80 mesh standard, 100 mesh on request |
| Loss on drying | ≤ 5.0% |
| Total ash | ≤ 5.0% |
| Packing | 25 kg fibre drum, double polyethylene liner |
| Shelf life | 24 months in unopened original packing |
| Storage | Cool, dry, away from direct sunlight |
Two lines decide most trials. The assay line: 75% peptides is the standard grade, and alternative assays can be produced to your specification. The mesh line: 80 mesh as standard, 100 mesh on request, because a peptide that has to disperse in an oral liquid behaves differently at the two meshes. The physical lines are the standard limits for the category: loss on drying at 5.0% or less and total ash at 5.0% or less. When you compare corn peptide specifications from different suppliers, the assay line is the first thing to settle, because a sheet that does not state the peptide basis explicitly is describing something else.
The sheet states limits. The batch COA states results. Ask for both before you compare corn peptide quotations.
How buyers use corn peptide
The product page lists four application areas, and they split into two practical groups. In liquid formats — liver-support oral liquids and recovery beverages — the water solubility and clean taste do the work, and the mesh choice decides whether the peptide disperses without a separate step. In dry formats — before/after-drink tablets and lozenges, and functional foods — the powder blends with the rest of the formula at 80 mesh. The recovery-beverage group is usually blended with milk thistle, DHM or kudzu ingredients, and buyers in that group typically need the documentation to cover the corn peptide component specifically, which it does because every lot ships with its own batch Certificate of Analysis.
Documentation: what ships with each lot
Every lot ships with a batch Certificate of Analysis. The specification sheet states the limits each lot is produced and released against; the COA states the results for the lot that would actually ship to you. That is why we ask our manufacturing partner for the most recent lot COA before a quotation goes out, and why we recommend buyers ask for the latest lot corn peptide COA rather than a generic sample. If the assay or mesh you need differs from the standard grade, we confirm feasibility and lead time with the partner within one business day rather than quoting blind.
Packing, MOQ and lead time
Standard packing is a 25 kg fibre drum with a double polyethylene liner, and 1 kg and 5 kg foil bags are used for samples and pilot runs. MOQ is 1 kg. In-stock items are ready in about 2 days; bulk production takes 3 to 5 working days after deposit for standard grades. Transit runs Xi'an to Shenzhen consolidation in about 3 days, then about 6 days by air to major U.S. and EU airports, or 18 to 25 days by sea.
What to ask a corn peptide supplier
- The assay basis first. 75% peptides as the standard grade, and what alternative assays can be produced to your specification.
- The mesh line. 80 mesh standard, 100 mesh on request, and how the finer mesh changes lead time.
- The documentation. A batch COA per lot, plus a sample COA with the quotation, so the limits and the results can be read side by side.
- The sample policy. Samples drawn from production lots, as a 1 kg or 5 kg foil bag of corn peptide powder so you test the material that would ship, with the free quantity and any cost-plus-courier charge quoted up front.
- The first-order mechanics. MOQ of 1 kg, packing options, OEM under your own brand, and lead time from deposit.
Frequently asked questions
What is corn peptide standardised to?
The standard assay is 75% peptides, from non-GMO corn (zein) protein by enzymatic hydrolysis, separation and spray drying. The powder is pale cream to light-yellow and fine, water-soluble with a clean taste. Loss on drying and total ash are each limited to 5.0% or less, and the powder is 80 mesh as standard with 100 mesh on request.
What applications is corn peptide used in?
The product page lists four: before/after-drink tablets and lozenges, liver-support oral liquids, recovery beverages (often blended with milk thistle, DHM or kudzu ingredients), and functional foods. In practice the water solubility and clean taste suit liquid formats as well as dry blends.
What is the MOQ, sample policy and lead time for corn peptide?
MOQ is 1 kg. Samples are always drawn from production lots; the free quantity depends on the item's value, and anything beyond is billed at cost plus courier and quoted up front. In-stock items are ready in about 2 days, bulk production takes 3 to 5 working days after deposit, and transit is about 3 days Xi'an to Shenzhen plus about 6 days by air to major U.S. and EU airports, or 18 to 25 days by sea.
Related: Corn Peptide — full specification, grades and documentation.