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How We Ranked Testosterone Peptides The ranking uses four criteria: directness of testosterone-axis mechanism, human evidence, regulatory clarity, and practical relevance to researchers comparing peptide mechanisms
The mechanism involves upregulation of tissue inhibitors of metalloproteinases (TIMPs) and simultaneous downregulation of matrix metalloproteinases (MMPs), shifting the extracellular matrix balance toward net deposition rather than degradation
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The site helps researchers compare vendor options, review research-use-only disclaimers, understand available peptide categories, check third-party testing signals, and navigate to related educational articles before evaluating any external supplier
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