Fat Smash Diet
The Fat Smash Diet is set out in the book of the same name by Ian K. Smith, M.D.
The principle behind the name is that you achieve your weight-loss goals by smashing bad habits and misconceptions about diet. The diet follows a 90 day program in 4 phases – detox, foundation, construction, and the temple.
The Fat Smash Diet is also used by popular TV show Celebrity Fit Club.
Fat Smash Diet Program
The Fat Smash Diet lays out your plan over 90 days for developing healthy eating habits and a healthy lifestyle, to promote fat loss and maintain a healthy weight.
Phase 1 – Detox (9 days)
Diet is essentially vegetarian – mainly fruits and vegetables (raw or steamed/grilled) to absorb natural nutrients, vitamins and minerals in 4 or 5 small daily portions, 3 hours apart, with plenty of water – plus daily exercise (30 minutes cardiovascular exercise 5 days a week, or a walk after dinner for up to 25 minutes).
This phase rids the body of toxins and impurities, developing a good basis for the following phases.
Phase 2 – Foundation (3 weeks)
Additional foods are allowed from a given list (lean meat/seafood, selected cereals and extra dairy), and physical activity is increased by up to 15%. The eating regimen of phase 1 is maintained (strictly no meals to be skipped) including plenty of fruit and vegetables, and fried foods are a ‘no-no’.
This phase establishes good eating and exercise habits for a healthy ongoing lifestyle.
Phase 3 – Construction (4 weeks)
Yet more additional foods are allowed from a given list (such as pasta and bread), portion sizes may be increased maintaining plenty of fruit and vegetables as before, with at least 4 daily meals stipulated. 1 non-fruit dessert per day is permitted (1 scoop low fat ice cream or 2-3 cookies or graham crackers) and physical activity is again increased by up to 25%.
This phase builds the diet plan up from the earlier ‘toning-down’ phases.
Phase 4 – The Temple (remainder of the 90 days)
Most foods previously denied may now be included in limited quantities, and physical activity set at 1 hour for each of 5 days weekly.
This phase is to maintain the ‘temple’ of your body, in which your lifestyle achieves a balance for maintaining your desired body weight. If your goal weight has not been reached by the end of the 90 days, phase 1 may be repeated.
Look for healthy meal ideas here.
Fat Smash Diet Book
The Fat Smash Diet book by Dr. Ian K. Smith M.D. contains the program philosophy and details of each of the 4 phases of the program, plus 83 pages of recipes and menu ideas. The book has four appendices of useful information:
- A body mass index chart for setting your weight goal.
- The fiber content of common foods for increasing your dietary fiber intake.
- Food nutrition label information.
- Calorie expenditure charts for common exercise/physical activity programs.
Recommendation
The Fat Smash Diet program has a growing following, especially given the exposure through Dr. Smith’s involvement with the VH1 Celebrity Fit Club. Many testimonials are positive about the results achieved, and the relative simplicity of the approach to weigh loss as set out in the Fat Smash Diet.
This is a simple diet program, manageable and by all accounts helpful.





I AM JUST STARTING THE FAT SMASH DIET! I WAS ON THIS DIET BEFORE A FEW YEARS AGO AND DID WONDERFUL BUT, THE THING IS NO DIET WILL WORK UNLESS YOU WORK WITH IT. SO THIS TIME I NEED TO DO MY PART! WISH ME LUCK!
Today is day1 for me and I am excited!!!! @ martha it is very hard for me to believe that you only lost 1lb..
I have lost 15 start in June. I am on phase !! My goal is 40 pounds. Starting weight was 204 on May 31. So I am feeling Great and I am very proud of Myself. Thanks Dr. Ian for the Fat Smash.
This has me eating healthier even in phase one but after 12 days of following it exactly I have lost only 1 pound. This will not keep me motivated.
I’m on day 5 and I’ve lost 8lbs!! It works!!
i lost 20 lbs in the detox and 15 in phase 2.sadly I lost momentum. But that is short lived! i lpan to get right back on the horse.
I am on day 4 of the diet and I have already lost 5 lbs!