As far as I know ,its the bum {glutes).this is because its the largest muscle you have and therefore can absorb the oil [steroid] better.also when injecting into a smaller muscle,the steroid will dissolve quicker and therefore not last as long as it should.the only problem with injecting into the bum is the sciatic nerve.providing you inject into the upper outermost area of the bum you should be fine.always remember to clean the area first with an alcahol wipe .then insert the needle into the muscle,then draw back the plunger before injecting [aspirate]to make sure youve not hit a vein.if you pull back on the plunger and blood appears in the barrel ,then youve hit a nerve.do not carry on with the injection and start the process over again with fresh equipment..
