I joined a gym yesterday

, i've been working out by myself for about 8 months and felt that it was the right time to move across to somewhere with the eqpt to move me to the next level.
How do you guys feel about protein supplements? I've looked up trial data and none of the companies that sell them in the UK provide any, and the few placebo control trials that are about show no difference. I asked the guy at the gym who did my induction/plan and he said he takes and see's no difference but still takes them. I don't follow that logic, what do you guys think? I have protein in my diet already.