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doi: 10.1111/j.1476-5381.1989.tb12654.x 186 TouharaK
We already did one

Intramuscular means the medicine is injected into muscle

Our bodies produce thousands of different peptides with various functions: insulin and oxytocin are well-known examples

Half-life runs short, around one to two hours in circulation, which is why most protocols dose two or three times a week instead of once

This safety profile makes supplementation low-risk even when not strictly necessary
