I found the easiest way to keep in the fridge without roomates/parents being weary is to just tell them. I have a guy and a girl room mate and I told them not to touch it. My mom brings over dinner for us sometimes. She is kind of snoopy anyway, but I told her that I was planning on taking it because it is responsible for the 20 to 30 pound increases in bodybuilders these days. Don't forget to say it is completely over the counter all syringes are non-prescription, and millions of people use it daily.
Just trying to help, it worked for me.