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Certain peptides may not be appropriate, or may need to wait, for patients with active cancer or a recent history of certain cancers (particularly for growth-hormone-related peptides), uncontrolled cardiovascular disease, pregnancy or planned pregnancy, certain autoimmune conditions depending on the peptide, or a known sensitivity to peptide therapy in the past

The application of collagen in the repair of peripheral nerve defect

Conversely, GHRP-2 did not significantly alter ghrelin levels, suggesting that its effects on leptin are more pronounced [2]
doi: 10.1073/pnas.1214099110
