bpc 157 a steroid BPC-157 + TB-500 Blend BPC-157 - Wikipedia
Description
Standard Maintenance Dose The usual dose for Vitamin B12 injections is 1,000 mcg every month
A gradual return might begin with easy skating, progress to harder pushes, then add stops and starts, and finally incorporate game-speed situations

Patients must demonstrate competence before being approved for independent home administration

How Often Should I Get a B12 Shot

The ampoules were probably OK for a short while after expiration , but I would not use them now 4 months later
In addition, the healed tendons are usually weaker than before injury
