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(A gray market of non-reputable pharmacies may dispense KPV for use with “for research purposes” labeling, but these are often nonaccredited and unregulated sources.) What the science says: What we currently know about KPV comes almost entirely from lab and animal studies

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Of note, most mechanistic data come from rodent hypobaric hypoxia models, which do not fully recapitulate real high-altitude conditions (e.g., cold, UV)