You all know the HCG - human chorionic gonadotropin - test with the pregnancy strips so I won't go into that. To test you human growth hormone - somatropin - ,
1. Reconstitute it.
2. Bring a pot of water to a boil.
3. Put your human growth hormone - somatropin - vial (which you are sacrificing) into the boiling water for 2 min.
4. Look to see if the solution turns milky/cloudy white.

If your human growth hormone - somatropin - is real it will turn cloudy/milky white after this procedure.

5. Let the vial set aside at room temperature for one day.
6. If the solution becomes clear again and you don't see any milkyness then the human growth hormone - somatropin - is fake.

Note the contaminants that are commonly found in human growth hormone - somatropin - powders and their threshold limit values per WHO regulations. human growth hormone - somatropin - is produced through recombinant gene expression in e.coli bacteria. These bacteria produce a lot of toxins in the manufacturing process that are painstakingly removed from the human growth hormone - somatropin - whilst maintaining human growth hormone - somatropin - in its active form.
Depending on the quality of the isolation process varying amounts of these toxins will be present in the powder. Even the most expensive human growth hormone - somatropin - preparations will contain at least some of these toxins. These bacterial produced toxins are likely the cause of many of the skin reactions reported here as they are triggers for the bodies immune response. They are nothing to worry about so long as they are not present in any lethal quantity which they are nowhere near.