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Scientifically based Supported by research

The 1:1 Diet by Cambridge Weight Plan is research-proven to be safe and effective. See the studies here.

The history

The 1:1 Diet was founded by Dr Alan Howard way back in the 60's. He was one of the original pioneers of obesity research and founder of the International Journal of Obesity - who spent 50 years at the University of Cambridge, most of it researching and devising the optimum weight-loss diet.

Over the last 35 years, dozens of studies have been published on the core components to The 1:1 Diet; one-to-one support, products and Plan, consistently demonstrating their safety and efficacy. Check them out below:

Landmark Research on Diabetes

Recently, the DiRECT study, based upon our products and Plan, has changed the way doctors and dietitians all around the world think about the reversal of diabetes. You can read the full research here 

Huge NHS Pilot Study Based Upon Our Plan

In fact, based upon the incredible results of DiRECT, the NHS and Diabetes UK have commissioned a pilot Type 2 diabetes remission study of 5000 patients.

Largest Ever Diabetes Prevention Study

Our products and Plan were also used successfully in the largest ever, multi-national study of diabetes prevention.

Study Subjects Keep Using The 1:1 Diet

All of the above studies resulted in over 10 kilos of weight loss and in the recent DROPLET weight-loss study, subjects again lost more than 10 kilos and improved multiple markers of health.

Subjects were so impressed with the diet plan, that 62% of them continued The 1:1 Diet at their own expense at the end of the study.

Case studies

There are so many inspirational success stories on our blog. Here are just a few that have shared their experience whilst on Plan. Check out the blog for more!

Paul Williams before and after weight loss


For years, I had battled with an overbearing weight which kept on increasing until it got to 128kg+.....

Read here
Weight loss before and after


Reality dawned on me when people kept referring to me as "madam" due to my large size and...

Read here
Luke Parry weight loss

My Lifelong Ambition was to wear Jeans

I was that girl that started her life as a chubby baby, so as I went through my early years....

Read here

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