Been lurking a while, first time posting.
Vector Peptide Supply came up in another thread and I realised I had no idea whether my experience with them was normal or not.
Worth noting there’s an Index Score of 70 for them published, which is more than I expected honestly.
Interested in actual experiences, and please say when you’re guessing.
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Quantitative amino acid analysis is what actually verifies content. Weighing the lyophilised powder does not, because you are also weighing residual salts and moisture.
If your solution went cloudy after reconstitution that is usually either the diluent or the temperature it was stored at. Worth posting what you used.
Batch-to-batch variation is the thing people underestimate. A passing result certifies one lot, not a product line, and vendors know most buyers do not make that distinction.
FI FirstPrinciples ·
Been doing this about four years. The vendors that publish batch documents are the ones that hold up. That is basically the whole heuristic and it has not failed me yet.