Today you can find diet plans to suit every need. From 3-day diet plans and 4-day diet plans there are diet plans than put you on a particular vegetable for an entire week or some that can specify a diet according to you blood group. All these free online diet plans are available for you to select from and some of these free online diet plans really work wonders. Though not all can be assured to show results there are some like the grapefruit diet which have been quite effective in weight loss programs, and to help in the treatment of diabetes. Most of these free online diet plans can help to control diabetes and cholesterol levels but can guarantee a complete relief. Then for those having trouble with inflammatory bowels or is on a pre- operational or post operational diet, the low residue diet or the low –fiber diet is recommended and all these diet plans are also available online. Another variety of the free online diet plans is the fat smash diet which is a 90-day program and is supposed to bring about a total change in not only our eating habits but also on our complete perception of life.