I couldn’t find a Doctor that offered the actual prolotherapy here in NZ.  They do it more in the US apparently though.  Instead I just used the basic principles of MEAT and applied heat instead of ice and creams to hopefully penetrate the skin instead of injections  into the joint.    However, the actual shots they give I believe are something simple like glucose?  Can’t remember the exact details now  but I just took high doses of glucosamine and MSM  instead.  Ginger Tea is good for getting the blood and circulation going also when you have taken something like that as it seems to dilate capilaries and blood vessels a little more and helps to get the nutrients to the areas they are needed for repair.   So I would take my glucosamine and drink ginger tea and then apply my wraps and heat.    Sometimes I’d wake and find any discomfort I had in my knee was gone the morning after just doing that.   It doesn’t happen over night but it eventually kicks in after a few days and after a month I notices a 80% improvement.   Took about three months of doing that for it to be 100%.  I hadn’t heard of prolotherapy until then.