I guess i can share so much about this because its the therapy that made my life worth living again.
Basic prolotherapy and why it fails: dextrose xylocaine injection. I have add this more then the others with very limited results and the treatment did not hold at all. Dextrose shrinks the ligaments makes it dry and it rebuild itself. I feel that its no strong enough and money is wasted on this for nothing, and all if not most scientific studies are based on this no wonder why it fails. Dextrose is best suited for the couch patato that does not exercise even then it needs to be repeated often.
Prolotherapy with sodium morrhuate (cod liver based) salin and xylocaine: this as a lot better results because the morrhuate sort of sticks to the ligaments and everything holds in place, i was very impress by this and i got back in the gym because of this combination right there.
Whole blood sodium morrhuate salin and vitamin B complex: the ultimate bomb, even with all the treatments my D3D4 would not hold came back loose after a few weeks of training with incline presses and more. This combination after done only twice got everything strong and not moving at all WOW. Whole blood is simply your blood being taken and then re-injected into the injured site and it works amazing cause blood coagulates.
PRP palatel rich plasma: expensive but will do the job depending on the condition, it fix my sacro illica problem for good no more moving there. I am also getting this for a hip labral tear cause by an idiot chiroprator why i hate them is so clear they have no clue about ligament laxity and think they can cure all idiots.
Why prolotherapy fails, simple because there are so many incompetent doing it, and its not a 4 deal treatment its more like 20 at least it was for me because of all the chiro adjustments that made me worst and more. I got 1 treatment per week for a long time but i am a special case, the morruhate was amazing but we did dextrose for a long time too.
You need to build your blood make sure you have enough iron and protein to repair the body, muscles good ligaments are the same, good multi vitamin collagen supplement vitamin C B vitamin D to make sure the ligaments get strong.
Training after the injury: well i hate to break it to you but for me i want longevity more then strength or risk to re injure myself needles to say squatting with big weights and deadlifts are out they compress the spine and are very dangerous.
I have gone the Vince Gironda way 8 X 8 honest workout and the adonis index both are amazing program and if you are like me you got enough mass at 41 i want to cut and to cut you don't need to lift super heavy weights.
Prolotherapy and conditions it treats:
All ligaments and tendons issues
It is not a cure all so if there is a labral tear with arthritis and the tendon is detach from the shoulder PRP prolo won't do squat i know there is a guy that got 3 PRP treatments 800$ a pop and it did absolutely nothing.
Some cases will require surgery, for me i got a hip labral tear 15mm front of the labrum got 3 whole blood prolo and i feel better, trained legs for the first time in 3 years, i do not have FAI or arthritis in there its only a cut.
Finding a good prolo is a bit hard and making sure he injects a lot of CC too first one i saw was an idiot 12cc for neck lower back and hip he was an incompetent, he also told me i would never train again idiot hahah.