What the 75% peptide figure on a bitter melon peptide specification really means
The number we always state with its supporting lines. In our quotations the peptide figure never travels alone: it is listed as peptides 75% with the loss on drying and total ash limits beside it, because a buyer's QA team will ask for the supporting lines anyway — and because a single big number is how specification misunderstandings start. If a quotation you receive shows one figure and nothing else, treat it as an invitation to ask questions, not as a finished spec.
An astragalus specification has two assays. A bitter melon peptide specification has one — and that single figure, peptides 75%, is the most misread number in the category. This article is about what it measures, what it does not, and how to write it into a specification your QA team can sign off.
What the 75% figure measures
Peptides 75% means that 75% of the powder, by mass, is peptide content generated by enzymatic hydrolysis of fresh bitter melon (Momordica charantia), followed by separation and spray drying. It is a bulk figure for the active fraction of the preparation — the same standard our production grade is published at.
That is a different philosophy from marker-compound standardization. A marker assay isolates one named compound and quantifies it against a reference standard; a peptide figure describes the composition of the preparation as a whole. Both approaches are legitimate. They answer different questions, and they suit different formulas.
What the figure does not tell you
Three things a peptide number never carries on its own:
- Process control. That lives in the supporting lines — loss on drying at or below 5.0% and total ash at or below 5.0% on our standard grade.
- Method. The product page states the figure but not the laboratory method behind it. Ask any supplier to name the method on the COA, and put the method requirement into your own specification wording.
- Format behaviour. Nothing about a peptide figure tells you mesh, solubility or flow. Those are separate lines, and they decide how the material runs on your line.
The supporting lines on the sheet
| Line | What it tells you |
|---|---|
| Peptides 75% | The grade of the preparation — the figure the quotation leads with |
| Loss on drying ≤ 5.0% | The drying step was controlled; the powder will not carry free moisture into your blend |
| Total ash ≤ 5.0% | Mineral burden is bounded — a proxy for how cleanly the separation ran |
| 80 mesh (100 mesh on request) | Particle size for capsule, tablet and powder applications |
| White to pale cream fine powder | Appearance your QC will verify against the retained sample |
How to write the specification
Copy this shape into your own document and you will not have a specification argument later:
Bitter melon peptide, peptides 75% (method stated on COA), produced by enzymatic hydrolysis of fresh Momordica charantia with separation and spray drying; loss on drying ≤ 5.0%; total ash ≤ 5.0%; particle size 80 mesh (100 mesh on request); appearance white to pale cream fine powder; packed in 25 kg fibre drum with double polyethylene liner; shelf life 24 months in unopened original packing.
Note what that wording does: it names the method requirement rather than assuming it, and it fixes the supporting lines at the same level of formality as the headline assay.
Why the process line matters
“Enzymatic hydrolysis, separation and spray drying” is not decoration on the specification sheet. Hydrolysis conditions decide how much of the material ends up as peptide; separation and spray drying decide the powder you actually receive. A supplier who cannot describe the process in one line cannot answer the follow-up questions either — and the follow-ups are where specifications are actually honoured.
If your formula needs a different figure
Alternative peptide figures, mesh sizes and carrier systems can be produced to your specification. When you send the target, include the method you want named and the dosage form, and we will confirm feasibility with the manufacturing facility before quoting rather than after. That habit — feasibility confirmed on paper first — is the cheapest specification insurance there is.
Frequently asked questions
What does peptides 75% mean on a bitter melon peptide specification?
It means 75% of the material, by mass, is peptide content produced by enzymatic hydrolysis of fresh bitter melon, with separation and spray drying. It is a bulk peptide measure, not a single marker compound, so ask any supplier which method generated the figure and require that method named on the COA.
Is bitter melon peptide the same as bitter melon extract standardised on a marker compound?
No. Bitter melon peptide is a protein-based preparation made by enzymatic hydrolysis and standardised on total peptides at 75%. A marker-standardised extract is a different preparation with a different profile. Which one suits your formula depends on the claim you are building - send us the target claim and we will recommend the right material before quoting.
What are the moisture and ash limits?
Loss on drying at or below 5.0% and total ash at or below 5.0%, as stated on the product page. Those two lines are the fastest way to check that the hydrolysis and drying process was controlled, and they should appear on every COA alongside the peptide figure.
Related reading
- Bitter melon peptide: a sourcing guide for blood-sugar formulas
- How formulators use bitter melon peptide in blood-sugar-support products
Related: Bitter Melon Peptide — full specification, grades and documentation.