Absolutely.
Last year, I got so fed up with how crappy I was feeling- major fatigue, bloating, crankiness, depression (feeling like I was going to cry all the time), overweight, etc. I bought a book called "Whole Life Nutrition Cookbook" and did the elimination diet for about a month. Now, I did not follow it to a T: It suggests a 2 day smoothie detox for the first 2 days, and I just could not get through 2 days of cold smoothies in January. I also had a hard time cutting out tomatoes and citrus (the elimination diet is just to help you rule out food sensitivities and both those items are foods that some people are sensitive to). However, I did cut out all refined sugar, all flour, oats, corn, dairy and only had meat once a week (it suggested going off meat for 1 month, but I just could not do it). I lost 10 lbs and had so much energy. I ate whenever I was hungry and rarely had cravings-when I did, it was for things like cabbage or sweet potatoes. I felt like FINALLY I was eating to fuel my body and get vitamins, not because I was bored or needed a pick-me-up-sugar-fix at 4 pm.
Unfortunately, I started eating sweets again and went off the deep end...*sigh*. Well, I am trying again, but being less strict. I have cut out flour, oats,corn and sugar. I am going easy on dairy but I still will have a little milk in my coffee or an occasional string cheese, or a bit of butter. I have been craving a lot of meat lately and I find that I function a lot better if I consume a lot of protein and also a bit of fat- I stay full longer. I am feeling really good.
I have also heard many people say that they have much better mental sharpness when they take fish oil- maybe something to try.
I have really bad restless leg syndrome and insomnia and I found that my symptoms went away the last time I cut out sugar and flour, so hopefully I can get those results again. My mom suffers from this too and the medications she takes are just horrid, such awful side effects. I am hoping I can avoid them just by changing my diet.