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Same 10 mg, Very Different Molecule Counts: A Micromole Table for the Catalog
A milligram is a measure of weight. Biology responds to the number of molecules. Small peptides weigh little per molecule, so the same mass holds many more of them than a large peptide does.
The table (10 mg of each)
| Compound | Approx. MW | Micromoles in 10 mg |
|---|---|---|
| KPV | 342.4 | about 29.2 |
| Semax | 813.9 | about 12.3 |
| Melanotan-2 | 1024.2 | about 9.8 |
| BPC-157 | 1419.5 | about 7.0 |
| Melanotan-1 | 1646.9 | about 6.1 |
| Tesamorelin | 5135.9 | about 1.9 |
Reading the table
The smallest listed, KPV 10mg, is a three-residue peptide, so 10 mg contains roughly fifteen times as many molecules as 10 mg of Tesamorelin 10mg. If two papers use the same milligram dose of different peptides, they are not comparing like with like.
A bigger one
NAD+ at 663.4 g/mol is a small molecule in this scale. A 500 mg vial of it holds about 754 micromoles, more than the whole table above combined.
Caveats
- Real vials contain counter-ions and water, so peptide content is lower than the label weight.
- Molecular weights shown are rounded averages.
- Use the net peptide content on the certificate of analysis for exact work.
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For laboratory research use only. Not for human or veterinary use, and not intended to diagnose, treat, cure or prevent any condition. This article is educational and is not medical advice.