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Route of Administration The same peptide can have very different effective half-lives depending on how it's delivered: Intravenous : Fastest onset, shortest duration the peptide enters circulation immediately and is subject to full first-pass clearance Subcutaneous : Slower absorption from the injection site creates a depot effect, often extending effective duration Intramuscular : Similar to subcutaneous but with slightly different absorption kinetics Intranasal : Rapid absorption, bypasses the blood-brain barrier for some peptides, but bioavailability can be variable Oral : Most peptides are destroyed in the GI tract
Published literature repeatedly references interactions involving nitric oxide pathways, angiogenic signaling, fibroblast activity, collagen organization, endothelial repair, oxidative stress modulation, and neurotransmitter systems
Cross-training: Include low-impact activities to give feet regular breaks from repetitive stress.
PubMed Andersen, N.B., Malmlf, K., Johansen, P.B., Andreassen, T.T., rtoft, G., & Oxlund, H