What Kata says is true...sometimes things that work for one person, may noy work as well for another. However, he simply mentioned the same things as I did, but specific brands. Also, I have been training clients right about your age for the last 10 years now, so I have a good idea what works for guys/gals your age.
Anyway, the creatine that Kata mentioned is quite good...Pro Labs brand. Other good brands are from Twinlab, Sportpharma, EAS, Champion, AST, Met Rx, etc.
For whey protein, Optimum as Kata mentioned is very good, as is brands from the above companies. Isopure is also good from Nature's Best. Then there is Labrada, Cytodyne Technologies, GEN, and others.
My favorite glutamine is AST's GL-3...but any powdered gluatmine from the above companies will be fine.
You just need to stick to the MAJOR brands for the best quality.