How would this be for lower back pain? Hurt myself deadlifting like 2 months ago and still having pain and limiting my exercise selection. Physical therapy not doing much at the moment. I have no experience with peptides so not sure what is meant by reconstituting. Also sub q injection is fine?
I would suggest getting an MRI done to know what sort of damage you have. If the pain is coming from a herniated disc, it's most likely because the disk is compressing a nerve. BPC 157 wouldn't be able to help with this nor would it be able to regenerate a herniated disc.
I can speak from experience of having successfully healed a severe L5-S1 disc herniation as a result of deadlifting. The key to treatment is the McKenzie method twice per day, 8 reps per session, along with deadhanging for as long as possible and as often as possible for as long as needed. To reheal the annular, you must do these exercises to encourage the protrusion to retract back within the disc and help close the annulus tear. The fibers will reattach overtime as you increase nutritional capacity via spinal decompression (deadhanging).
To encourage the disc to rebuild you should be taking glucosamine and chondroitin which are the precursors for the inner gelatinous disc material. Your body knows what to do with these compounds. Taking a non-hydrolized type II collagen supplement would also be a good idea.
If your injury is a muscle tear or a ligament tear, then maybe BPC 157 would be complimentary.