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CJC-1295/Ipamorelin will improve body composition over time because elevated GH naturally supports fat metabolism, but that is a secondary effect rather than the primary mechanism

Both BPC-157 and TB-500 have been studied in skeletal muscle injury and regeneration models with BPC-157 characterised as promoting muscle healing through angiogenesis, anti-inflammatory effects, and cytoprotective signalling that reduces ischaemic and inflammatory muscle cell death, and TB-500 characterised as promoting skeletal muscle repair through PI3K/Akt-mediated satellite cell activation and myocyte migration, angiogenic support of regenerating muscle, and actin cytoskeletal regulation thats fundamental to the morphological changes required for myogenic differentiation

Alternate them by time of day or by days of the week instead

In the decades since, researchers have repeatedly returned to it as an open question in neurochemistry, with one influential review aptly describing it as a "still unresolved riddle" (Kovalzon et al., 2006)