Your body gets all the nutrients it needs and uses its fat stores for energy. And because the diet is high protein, you don’t lose muscle mass or have cravings.†Cambridge Weight Plan goes way back. We can trace its roots back to the 60s, when biochemist Dr Alan Howard started to research the perfect diet. Since 1984, when The Cambridge Diet became commercial in the UK, thousands of people from all over the world have used our help, support and products. We’d like to think that the dieter's experience of Cambridge Weight Plan is a bit like having a friend by their side. But not like a nagging friend. More like a really supportive, knowledgeable, wise and experienced friend cheering them on.