When the injury is in a specific joint and you need a concentrated dose of growth factors at that exact location, PRP's targeted delivery is an advantage
Due to the natural red color of B12, if the patch comes into contact with moisture (including water, sweat or hand sanitizer) it may leave a red/pink stain on your skin
Nonetheless, it should be used within a certain timeframe as recommended by the pharmacy (often 28 days after first puncture, per general guidelines for multi-dose vials, unless otherwise specified)
There are differences in practice between countries, with Canada and Sweden favoring use of oral vitamin B 12
The MHRA have spent time during COVID alongside the ASA (Advertising Standards Agency) warning people who sell B12 injections direct to the public through beauty salons and the like that they absolutely must not tell those they advertise to, what B12 injections will do or what they can help with