What Does Lab-Tested Peptide Mean?

The phrase lab-tested means very little on its own, because it does not say what was tested, by whom, or for which batch. A single purity number is not the same as a full picture, which would include identity to confirm the molecule, purity to estimate target compound versus impurities, net content to check how much is actually in the vial, and the contamination checks of sterility, endotoxin, and heavy metals. Just as important is which batch the testing came from. Results from a different production run do not prove anything about the specific vial you received, so batch matching is the line between useful evidence and a generic claim. When a seller says lab-tested, the questions that actually matter are which tests were run, and whether that report ties to your batch. Without both, the label is a marketing phrase, not proof.