What the research shows
Researchers blocked a brain artery in rats and measured gene activity in the affected cortex. Semax altered expression of genes involved in immune and vascular responses. This experiment examined tissue responses to a controlled injury. Rat brain gene-expression experiment.
A resting-state imaging study of 52 healthy volunteers compared short-term responses to Semax, Selank and placebo. Differences appeared in connections involving the right amygdala and temporal cortex. The experiment did not measure stroke recovery. Human brain-imaging study.
Documented formats
The imaging study used a nasal preparation. The rat study used a separate experimental preparation and model.
Testing and purity
Check that the recorded sequence is Met-Glu-His-Phe-Pro-Gly-Pro. The three-residue tail also appears as a standalone comparison material in published experiments.
How to read a batch reportQuestions about Semax
Why do researchers study the tail separately?
Testing Pro-Gly-Pro alongside the full sequence helps researchers ask which changes require the whole peptide.
Does an imaging change establish better memory?
A memory claim would require a measured change on a suitable memory task. Resting-state scans measure relationships between brain signals.