National Foundation for Celiac Awareness, approximately 1% of the U.S. population has celiac disease, and it is believed that even more people with celiac disease are undiagnosed or misdiagnosed. In addition, it's believed that as many as 1 in 20 Americans have non-celiac gluten sensitivity (NCGS). So, trying a gluten free diet could be beneficial for people who are noticing symptoms of sensitivity such as gastro-intestinal distress, headaches, and joint pain with no other explanation. Otherwise, you run the risk of losing out on the valuable fiber and nutrients that gluten containing foods possess. Don't take my word for it. WebMD outline some facts and concerns about the issue on their site. In people without gluten sensitivities there has been no noted health benefit and some people actually gain weight when they go gluten free. The bottom line is you have to educate yourself and make decisions based on knowledge, not hype. Be smart. Gluten free cookies are still cookies, and overly processed or refined foods are unhealthy regardless of whether or not they contain gluten. If you suspect a problem with wheat or gluten, talk to your doctor. Ask for the appropriate testing, and get to the bottom of the problems you're having. It took me almost 10 years to get my food issues sorted out... just don't give up until you feel better.
See my post about getting proper nutrients on a gluten free diet.