I think the placebo effect will explain the benefits of most (or all) supplements. I have given up trying to discourage people from using them. Most people just will not put in the work in the gym unless they think they have an extra advantage. The only supplements I have used in the last few years are Myoplex shakes. I only use these because when I am working out, I eat 6 meals a day, and I don't want to prepare that many meals.
Chad - I wish I had your resolution goals. I want to get my bench back to 365, and my bodyweight back to 250. They are pretty much reversed right now

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I was a truck driver for 9 years, on and off, until last November, and that is just not a good profession for my health. The last year was the worst, my weight went from 300 to 390, and my blood pressure was at 190/120. Needless to say, I finally had to quit and I am still looking for a new career that pays as much. I'm 33, much to young to be risking my health like that.
I am looking forward to lifting again, but am looseing some fat first. Trying to get my blood pressure under control first. I lift heavy, and I'm afraid something might pop with BP that high.
It's going pretty good, I'm down to about 350 now, and the blood pressure is down close to normal, about 145/90.
I'm really glad to hear that there are some lifters here. Since we do have this Everything Else forum, I'm looking forward to talking with you guys about it.
The opinions here are correct, creatine is not worth the money based on it's usefullness. It is, however, worth it if it gets your butt in the gym.
Paul