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Administration Routes in Research Multiple delivery methods have been investigated for individual peptides: Intraperitoneal injection Most common in rodent studies for both peptides Subcutaneous injection Used in some clinical observations (not controlled trials) Intramuscular injection Applied in musculoskeletal research protocols Oral administration Uniquely effective for BPC-157

Lets walk through a few common scenarios

However, once a multi-dose pen is first used, the in-use period (discussed in the next section) takes precedence over the printed expiration date

Most peptides degrade in the digestive system, making injectable administration standard