Beta wrote:So you want to gain muscle but trim fat?
1) I recommend not taking ANY supplements.
I would disagree to not take any supplements. There are lots of supplements that can help your body.
Beta wrote:2) Work out your legs more and your body will produce more testosterone.
3) Avoid soy products (soy is pro-estrogen) and eat less foods with tons of chemicals/dyes in them.
I would agree these two are extremely important when weightlifting. Legs are always ignored but are extremely important in building a complete physique (both strength and looks).
I don't know what weight training program you are on, which makes it difficult to recommend supplements. Some supplements are better for different styles of training (hypertrophy, mass strength, cutting phase, etc.). However, generally speaking I think the following supplements are all you really need:
1. Creatine - A must. This will increase your weight without necessarily forcing you to gain fat. However, that depends on your eating, your body's response, etc. Note, that Creatine should not be taken if you are not going to do resistance training. Also, it is absolutely imperative you keep your water levels high to get any impact from Creatine and that you properly stack it.
2. Glutamine - An essential amino acid for building muscle. I like to take a Gultamine/Creatine mix with a bonding agent like Taurine.
3. HMB - This is great for losing fat but keeping muscle. I recommend using this during a phase in which you are trying to retain muscle but lose overall weight.
Obviously, protein shakes should be taken as needed. Also, I don't know how much reading you have done, but I would recommend doing a lot of research before taking any supplements. All people's bodies react differently to different supplements. I have told friends I swore by Creatine, and for them it did very little, but for me my bench and squat significantly improved. So, all in all, you need to be aware of benefits and risks.
Anyhow, that was kind of a long answer to a short question, but it is what it is. There is a website
http://www.bodybuilding.com which has tons of articles available to you to read (they are not all about bodybuilding). There are lots of books, but one of my favorites is Serious Strength Training.
Good luck.