Cambridge Diet (Meal Replacements)

The Cambridge Diet is a programme with a very low calorie intake, based on meal replacements — formulated shakes, soups and bars — that take the place of ordinary meals. It is organised in steps, from the strictest variant to the gradual reintroduction of real food.

The advantage is rapid weight loss and simplicity (no cooking, no deciding). The disadvantages are the cost, the very low calorie intake and the fact that it does not teach real eating habits. Due to the risks, this type of diet should be followed only under specialist guidance.

History and origin

The Cambridge Diet was developed in the 1970s by British nutritionist Alan Howard and his team at the University of Cambridge, as a response to the need for safe rapid weight-loss protocols for cases of severe obesity. The researchers formulated meal replacements to provide the minimum required essential nutrients at a very low calorie intake — the concept that would define the VLCD (Very Low Calorie Diet) category. The programme was commercially launched in the United States in 1984, then expanded to the UK and Europe.

Over the decades, the programme underwent several rebrands and reformulations. Initially known simply as the “Cambridge Diet”, it became the Cambridge Weight Plan and later, in the UK, “The 1:1 Diet by Cambridge Weight Plan”. The stepped structure was developed precisely to address one of the frequent criticisms of VLCD diets: the lack of a transition plan to normal eating, which often leads to weight regain.

The VLCD meal-replacement category spawned numerous commercial variants: SlimFast, Optifast, Medifast and others. Cambridge remains one of the programmes in this category with the longest tradition and the most developed system of individual consultants, distinguishing the product from competition in the commercial diet market.