My wife wanted to do Whole 30 at the beginning of the year. I was not very enthused but wanted to be supportive, as I knew it would be difficult for her to pull off if I was going through the normal diet for the month. For those of you not familiar, you eliminate beans. legumes, grains, dairy, sugar, alcohol, wheat, maybe more not sure for 30 days. You eat a lot of meat, fish, chicken, fruits and vegetables. Honestly, I let my wife do the research since it was her idea. It's not easy, but you definitely get results. I lost 12 pounds the month of January, and have lost 2 more in February. My wife lost 10 pounds. Keep in mind, I worked out probably 3-4 times per week as well w/ our Bowflex Max Trainer w/ sit ups and push ups since it was January and really didn't get to ride my bike. My wife probably worked out only 5-6 times the whole month. I personally know 3 other people that have done Whole 30, and they all lost 10 pounds or more in the month as well. My wife and I continue to have probably 3-4 days per week that would be considered Whole 30 compliant, but we're not strict about it. We use our favorite recipes from the cookbooks. Biggest thing for us is cutting out added sugar, dairy, and grains. Alcohol intake is very little during the week, with a few drinks on the weekend.
I think Whole 30 is familiar to the ketogenic diet someone else mentioned, but not entirely sure.
Good luck to everyone!