Some more info...
If you go the nutrition route, unless you do a double major, you will might miss out on some exercise-related info with just a minor. THis will all depend upon the way the program is constrtucted (flexibility in choice of classes). Ideally, this would be a great way to go.
There are several programs where you could be taught by professors who are indeed "in the know" as far as AAS use and resistance training. These kind of higher up guys might not even be teaching, though, and if they were, they might not have time for U-grads.
I personally would look into something like this:
Find a small school with 1 professor (or more) that are intetested in BB'ing or at least wt. training (abd body composition for instance). They are out there (trust me ; ) ). Do a Kines (exercise science) major with a nutrition and perhaps even a biochem minor.
In your minors, I would take pharmacology, endocrinology and biochemistry. YOu may have to suffer through Organic Chem to do this.
Take extra phys. classes, esp. muscle phys if you can. YOu can go to a larger U. and take these perhaps. You might also be able to sit in on a grad class when you're a senior.
IN your major, work with this professor in his lab doing the kind of research you are intetested in. It prob. won't be: does muscle grow better on 1000mg test / week or 1000 mg Deca / week. Many prof's who study ergogenic aids are willing to be felxible.
Do a Sr. project w/ this professor, too, where you would have more control over the topic. The door is wide open for research w/ BB'ers.
P.S. PM me if you have more questions or want more details!