Rleeson save your money on glutamine, not only is it crap and a hassle butits very expensive.
Its crap in a bottle.
Flax seed oil is great, its got many many beneficial properties, and hey its extra calories. I guess thats not really a supplement, but if you aren't not taking it and have the money, start taking it! Don't expect miracles though, its great but not that great, but if your taking 3 tablespoons a day in a couple weeks your gonna notice your skin become softer, and shinier and even maybe some wrinkles might smooth out

Ive heard that its beneficial for joints at 6 tabelspoons a day.
Creatine is great for some, but i found it not to work one iota for me, but it sure doesnt hurt to try
And of course theonly other thing i recommend is prohormones and steroids(provided you researched and are ready for them), those will put on mass like no combination will! Those are truly the master of all supplements. They also will allow you to build muscle and often gain no fat while doing it even when eating higher amounts of calories then normal, often users will loe fat while gaining the muscle because they are in such a high anabolic state, like when they first started training, except even higher.