Usually when I use HGH I fill up a slin syringe with 3 doses. I will take 2iu per dose (6iu total in the pin). I use the same slin pin 3 times before I toss it. I of course use alcohol each time I pin Sub Q then put the pin back in my fridge. I have been doing this method for years because it is efficient.
Other than some possible blood getting into the pin with the remaining GH doses (rarely ever happens) and I always wipe the needle.
Is there any harm in using this method or is it totally fine?
Like I said, it doesn't seem to affect the potency of the GH.