
The Cambridge diet is a calorie-controlled diet aimed at rapid weight loss. It has been renamed the 1:1 diet, and includes personal one-to-one support with a diet consultant to guide you through the different stages. The diet follows six stages and total calories gradually increase from around 500 to 1200 kcal per day before the maintenance stage is reached. There are 35 Cambridge diet products, including noodles, soups, porridge, shakes and bars. All are claimed to be nutritionally balanced and 200 calories or less.
| Characteristics | Values |
|---|---|
| Calories | Very low-calorie diet, with total calories gradually increasing from around 500 to 1200 kcal per day before the maintenance stage is reached |
| Meal replacements | Shakes, soups, bars, noodles, porridge |
| Stages | Six stages |
| Weight loss | Rapid weight loss |
| Duration | First 12 weeks are very low-calorie, then more meals are introduced for more flexibility |
| Support | One-to-one support with a diet consultant |
| Cost | Ingredients and meal replacement ideas are provided at a cost |
| Reviews | Weekly review with consultant |
| Concerns | Extremely restrictive, unsustainable long term, may lead to sudden death by cardiac arrest |
| Benefits | May help to manage Type 2 diabetes |
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What You'll Learn
- The Cambridge diet is a calorie-controlled diet aimed at rapid weight loss
- The diet has six stages, with calories gradually increasing from 500 to 1200 kcal per day
- The diet has been renamed the 1:1 diet, with the addition of a 'personalised consultant'
- The diet has been characterised as a fad diet due to its starvation-level calorie intake
- There is some research to suggest that very low-calorie diets like the Cambridge diet may help to manage Type 2 diabetes

The Cambridge diet is a calorie-controlled diet aimed at rapid weight loss
The Cambridge diet has been renamed the 1:1 diet, as it includes personal one-to-one support with a diet consultant to guide you through the different stages. The diet consultant is there to support you through the plan and adapt it when required. Ingredients and meal replacement ideas are provided (at a cost), and you continue to see your consultant once a week for a review and to order more meals.
The first 12 weeks see quite a drastic approach to cutting calories, which creates a very large calorie deficit for a short, intense period. This often brings about substantial weight loss. Over the long term, more meals are introduced, allowing for more flexibility. While it may provide quick results in the short term, there are concerns that it is an extremely restrictive weight-loss plan that is unsustainable long term.
There is some published research to suggest that very low-calorie diets like the Cambridge diet may help to manage Type 2 diabetes. The Cambridge diet approach has been included in the largest ever study of diabetes prevention.
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The diet has six stages, with calories gradually increasing from 500 to 1200 kcal per day
The Cambridge diet is a calorie-controlled diet aimed at rapid weight loss. The diet has six stages, with calories gradually increasing from 500 to 1200 kcal per day. The first 12 weeks see a drastic approach to cutting calories, creating a large calorie deficit for a short, intense period. This often brings about substantial weight loss.
The diet starts as a very low-calorie diet consisting of meal replacements in the form of shakes, soups, bars, noodles and porridge. The first step consists of 3-4 products totalling at least 600 kcal per day. The remaining steps reintroduce regular meals and remove the meal replacements in various combinations.
The Cambridge diet has been criticised for being an extremely restrictive weight-loss plan that is unsustainable long term. It has also been characterised as a fad diet due to its starvation-level calorie intake, extreme weight loss, and its rapid rise and fall in popularity in the 1980s. However, there is some published research to suggest that very low-calorie diets like the Cambridge diet may help to manage Type 2 diabetes.
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The diet has been renamed the 1:1 diet, with the addition of a 'personalised consultant'
The Cambridge Diet Plan has been renamed the 1:1 Diet. The 1:1 Diet is a weight loss plan that provides a personalised consultant to help you lose weight. The consultant will cheer you on and keep you on track. The diet is scientifically proven to provide all the nutrition you need while reducing your calorie intake. There are six variations of the plan, ranging from 440 to 1,500 calories a day, depending on factors such as your starting weight and weight-loss goals. The 1:1 Diet offers a menu of shakes, soups, bites, porridge, savoury rice, couscous and pasta dishes, smoothies and meal bars.
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The diet has been characterised as a fad diet due to its starvation-level calorie intake
The Cambridge diet is a calorie-controlled diet aimed at rapid weight loss. It has been criticised for being a fad diet due to its extremely low-calorie intake, which has been described as starvation-level. The diet has six stages, with total calories gradually increasing from around 500 to 1200 kcal per day before the maintenance stage is reached. The first step consists of 3-4 products totalling at least 600 kcal per day. The remaining steps reintroduce regular meals and remove the 1:1 products in various combinations. The diet has been renamed the "1:1 diet" with the addition of a 'personalised consultant' working with the dieter to create an individualised diet plan. This extra support provides accountability and has been shown to help increase success rates.
The Cambridge diet is an extremely restrictive weight-loss plan that is unsustainable long term. It is a very low-calorie diet (VLCD) and there are concerns that it could lead to sudden death by cardiac arrest. Modern guidelines state that a diet of less than 1000 kcal/day should not be followed for more than 12 weeks, and a diet of less than 600 kcal/day should have medical supervision. The Cambridge diet approach has been included in the largest ever study of diabetes prevention, and there is some published research to suggest that VLCDs like the Cambridge diet may help to manage Type 2 diabetes.
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There is some research to suggest that very low-calorie diets like the Cambridge diet may help to manage Type 2 diabetes
The Cambridge diet is a calorie-controlled diet aimed at rapid weight loss. It has been renamed the 1:1 diet and includes personal one-to-one support with a diet consultant to guide you through the different stages. The diet follows six stages and total calories gradually increase from around 500 to 1200 kcal per day before the maintenance stage is reached. The first step consists of 3-4 products totalling at least 600 kcal per day. The remaining steps reintroduce regular meals and remove the 1:1 products in various combinations. There are 35 Cambridge diet products, including noodles, soups, porridge, shakes and bars. All are claimed to be nutritionally balanced and 200 calories or less. The first 12 weeks see quite a drastic approach to cutting calories which creates a very large calorie deficit for a short, intense period. This often brings about substantial weight loss.
There is some research to suggest that very low-calorie diets (VLCD) like the Cambridge diet may help to manage Type 2 diabetes. The Cambridge diet approach has been included in the largest ever study of diabetes prevention. While it may provide quick results in the short term, there are concerns that it is an extremely restrictive weight-loss plan that is unsustainable long term. Modern guidelines state that a diet of less than 1000 kcal/day should not be followed for more than 12 weeks, and a diet of less than 600 kcal/day should have medical supervision, as very-low-calorie diets can lead to sudden death by cardiac arrest.
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Frequently asked questions
The Cambridge diet is a calorie-controlled diet aimed at rapid weight loss. It is a very low-calorie diet consisting of meal replacements in the form of shakes, soups and bars.
The Cambridge diet follows six stages, with total calories gradually increasing from around 500 to 1200 kcal per day before the maintenance stage is reached. The first 12 weeks see a drastic approach to cutting calories, which creates a very large calorie deficit for a short, intense period.
The Cambridge diet has been characterised as a fad diet due to its starvation-level calorie intake, extreme weight loss, and its rapid rise and fall in popularity in the 1980s. Modern guidelines state that a diet of less than 1000 kcal/day should not be followed for more than 12 weeks, and a diet of less than 600kcal/day should have medical supervision as very-low-calorie diets can lead to sudden death by cardiac arrest. However, there is some published research to suggest that very low-calorie diets like the Cambridge diet may help to manage Type 2 diabetes.





































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