The plan encourages healthy and steady weight loss that has long-term results - in fact, in our SlimFast review, our tester Sarah explains how she lost an incredible five stone on the plan.
But what is SlimFast, and how can you use it to get equally great results?
What is SlimFast?The SlimFast Plan is built around a selection of meal replacement products, low calorie meals and a variety of snacks, like bars, pretzels and porridge.
Each SlimFast meal is nutritionally balanced so you don't have to take additional vitamin supplements, unlike many other diets. SlimFast is good for people who lead busy lives or who often eat on the run - because the meal replacements are pre-packed, there's no need for weighing portions or counting calories.
How does the SlimFast diet work?The SlimFast plan is really easy to follow - it's said to be 'as simple 3. 2. 1', because each day, you can eat three snacks, two meal replacement shakes or bars, and one healthy 600 calorie meal per day (or 800 calories for men).
The SlimFast plan is designed to deliver between 1,200-1,400 calories per day for women and 1,600 calories a day for men. This creates a calorie deficit of around 600-800 calories a day, so you should experience a steady weight loss of around 1-2lbs per week.
In addition to eating up to six times a day, you're also encouraged to drink plenty of water, and take up regular exercise.
What are the drawbacks of SlimFast?The plan is portion controlled, so if you're used to large portions you may struggle during the first few days.
If you're eating out in the evening or celebrating a special occasion, you'll also have to try and keep within the 600 calorie limit, or miss out a few snacks in the day to allow for the extra calories.
What do you do on the SlimFast diet?A day on the SlimFast diet plan might consist of:
Breakfast: SlimFast Chunky Chocolate Shake
Snack: SlimFast Golden Syrup Porridge
Lunch: SlimFast Salted Caramel Meal Replacement Bar
Snack: Small bunch of grapes
Dinner: A 600-calorie, balanced meal of your choice
Snack: SlimFast Cheddar Flavour bites
SlimFast products are sold in most major supermarkets, Boots and Superdrug stores, and keep your eyes peeled, as they often have deals on certain products.