Achilles detachment in rat and stable gastric pentadecapeptide BPC 157. J Orthop Res 2006
In addition, there's some cardiovascular benefits
Treat this needle with respect: don't touch its tip or the inside of your ampoule/vial to maintain sterility
Most practitioners recommend starting at 250-300 mcg daily to assess tolerance, then potentially increasing to 400-500 mcg if initial response is suboptimal and no side effects occur

Rare: may affect up to 1 in 1,000 people Acniform and bullous eruptions (acne-like and blistery skin eruptions) Not known: frequency cannot be estimated from the available data Headache, dizziness Nausea (feeling sick), vomiting, diarrhoea Malaise (feeling unwell) Rash, itching Injection site reactions including injection site pain, injection site erythema, injection site pruritus, injection site induration, and injection site swelling (Reactions at the site of the injection) Exanthema (a widespread skin rash) Chromaturia (unusual coloured urine) Fever Hot flushes (a feeling of intense heat with sweating and rapid heartbeat) Chills (feeling of coldness accompanied by shivering) Paraesthesia (feeling of pins and needles) Tremor (tremble or shakes) Hypokalaemia (decreased potassium levels in the blood) Reactive thrombocytosis (body produces too many platelets) Reporting of side effects If you get any side effects, talk to your doctor, pharmacist or nurse

Nasal spray makes sense if needle aversion significantly impacts your ability to maintain consistent protocols