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Regular use, especially alongside aerobic training, may contribute to more efficient heart function and improved overall stamina

The nervous system data is thin compared to the wound healing research, but it keeps this peptide on the radar for neuroscience-adjacent work

Coincidence

None of these pathways directly substitute for another, which is part of why researchers interested in a fuller picture of metabolic regulation may look at all three within the same body of literature not to combine effects, but to understand how separate systems might interact at a mechanistic level

The answer depends on the question you are trying to answer

Other gauges may also be acceptable