Undertook the CWP under multidisciplinary medical supervision (cancer and diabetes). The focus was to cleanse the physical body of toxins, the weight loss aspect was an added bonus (started at UK size... See more
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Losing over 6 stone with The 1:1 Diet has completely transformed my life — not just physically, but mentally and emotionally. Living with chronic pain, spinal conditions, fibromyalgia and three bow... See more
The best diet I have ever tried! Science based, clinically tested, safe and provides amazing weight loss results. There are 6 calorie programs, all tailored to you. Maintenance place a big role as i... See more
Company replied
I started on the 1st January 2025 and had lost over a stone six weeks in, love the shakes, yoghurt pancakes are one of my favourite along with the porridge. Fits into a busy life, so instead of pickin... See more
Company details
- Weight-Loss Service
- Food & Beverage Consultant
- Food Manufacturer
- Food products supplier
- Health consultant
- Life Coach
Written by the company
The 1:1 Diet, originally known as The Cambridge Diet, was launched in the UK in 1984 and has helped thousands of people worldwide lose weight and live healthier, happier lives. Through our inspiring Consultants, we provide meal replacements and products that help aspiring dieters lose weight and improve their health. Our meal replacements and products are specifically designed to ensure each dieter gets the correct amount of nutrients while reducing their calorie intake. Developed, tested and validated by expert nutritionists and researchers - “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.” You choose your personal diet Consultant who will help you create your Plan and give you the products you need. There are two ways to start—you can either find and contact a Consultant from the thousands available or try the diet with no obligation via the Taster Pack for only £9.99. Both options are available on the website at https://www.one2onediet.com/.
Contact info
United Kingdom
- marketing@cwp-uk.com
- www.one2onediet.com
Try The 1:1 Diet for only £9.99
4.7
Excellent
270 reviews
No recent history of asking for reviews
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Hasn’t replied to negative reviews
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I lost 3 1/2 stone in 3 months
I lost 3 1/2 stone in 3 months. I had a very supportive consultant and loved the products.
11 December 2024
Unprompted review
Reply from The 1:1 Diet by Cambridge Weight Plan
Huge congratulations on your amazing 3 ½ stone weight loss in just 3 months! 🎉💪 We’re so happy to hear that you had such great support from your Consultant and enjoyed the products—that combination really makes all the difference!
Thank you for sharing your experience and for being part of The 1:1 Diet community. Wishing you continued success on your journey! 💙
– The 1:1 Diet Team
Lost the wight and maintained it
I lost 3 stones in 3 months over 11 years and have maintained my new size ever since. The support and expertise that my consultant provided every step of the way made such a positive difference!
11 March 2025
Unprompted review
Reply from The 1:1 Diet by Cambridge Weight Plan
Losing 3 stone in 3 months and maintaining it for over 11 years is an absolutely incredible achievement! 💪💙 We’re so happy to hear that the support and expertise of your Consultant made such a positive difference in your journey.
Thank you for sharing your inspiring story—it’s proof that The 1:1 Diet can truly deliver lasting results! Wishing you continued success and happiness. ✨
– The 1:1 Diet Team
I lost weight with The 1:1 Diet 14yrs…
I lost weight with The 1:1 Diet 14yrs ago ( formally cambridge diet ) not only did I lose 7 stone but it enabled me to conceive the 2nd time around after struggling after my first child.
Truly life changing after trying so many diets this one gave me the beginning restriction I needed to really cut back and reassess my eating habits and slowly reintroduce healthy foods back into my diet. I would recommend this plan to everyone.
11 March 2025
Unprompted review
Reply from The 1:1 Diet by Cambridge Weight Plan
Wow—what an incredible journey! 🎉 Losing 7 stone and having The 1:1 Diet play a role in helping you conceive your second child is truly heartwarming. 💙 It’s amazing to hear how the plan gave you the structure and reset you needed to transform your eating habits for the long term.
Thank you for sharing your inspiring story and for recommending The 1:1 Diet to others. Wishing you continued health and happiness! ✨
– The 1:1 Diet Team
Best Diet I’ve ever done and my…
Best Diet I’ve ever done and my goodness I’ve done a few. Tasty meals, no prep or waste. Got the job done with loads of support
11 June 2024
Unprompted review
Reply from The 1:1 Diet by Cambridge Weight Plan
Thank you for your fantastic review! 🎉 We’re so happy to hear that The 1:1 Diet has been the best diet you’ve ever done! 💙 The convenience of tasty, no-prep meals combined with one-to-one support really does make all the difference.
Huge congratulations on your success, and thank you for being part of The 1:1 Diet community! Wishing you continued health and happiness. ✨
– The 1:1 Diet Team
Excellent - But Requires Commitment and Work.
This is a great diet if you commit to it and use the time when you’re only eating the products to work on your relationship with food and the changes you’ll make after you’ve lost the weight. I think it probably makes a huge difference if you have a good consultant and make use of your weekly call.
13 October 2024
Unprompted review
Reply from The 1:1 Diet by Cambridge Weight Plan
Thank you for your thoughtful review! 💙 You’re absolutely right—commitment and using the plan as a time to reset your relationship with food can make all the difference. Having a supportive Consultant and making the most of your weekly check-ins is key to long-term success!
We’re so pleased to hear you found The 1:1 Diet helpful and appreciate you sharing your insights. Wishing you continued success on your journey! ✨
– The 1:1 Diet Team
A complete scam
I was scammed out of money by one of their “consultants” as I should never have been on their products as I am ill. I immediately contacted the company who took weeks to get back to me and then told me it wasn’t their problem.
Where is the company’s duty of care?
They just don’t care.
Updated: having seen the response from 1:1, I can see they have clearly got me confused with someone else. The “consultant” is not anything to do with the NHS and was consulted as soon as I became disabled. Over 10 weeks for a reply, via email which can be proved, is not good enough.
More lies told by this company
9 November 2023
Unprompted review
Reply from The 1:1 Diet by Cambridge Weight Plan
Hello, and thank you for your feedback.
We're sorry to hear you feel that you have had a bad experience. When a dieter doesn't disclose changes to their medical conditions, it makes it very difficult for Consultants. We understand that you didn't tell the Consultant your medical situation had changed. In this case, the Consultant is a paramedic in their day job, so they take the medicinal side of clients very seriously and they are aware of the importance of health and well-being perhaps more than others. In this case, we also consulted with a fully qualified doctor when we audited and investigated the case. The Consultant was found to have acted in line with protocols.
In terms of our response to yourself, this was done within 48 hours so we are unsure why you would say this statement.
If you have any further questions, our team are always happy to help.
The 1:1 Diet Team.
I have lost a stone in 5 weeks
I have lost a stone in 5 weeks, this is the only diet that has worked for me post menopause. I feel amazing at well as I’m getting the right nutrients. my consultant is very knowledgeable and supportive. Some people may knock it but I love it
16 September 2024
Unprompted review
Reply from The 1:1 Diet by Cambridge Weight Plan
Huge congratulations on losing a stone in just 5 weeks! 🎉💪 We’re so thrilled to hear that The 1:1 Diet has been the right fit for you post-menopause and that you're feeling amazing while getting the right nutrients. Having a knowledgeable and supportive Consultant really makes all the difference!
Thank you for sharing your experience and for your kind words—we love that you love it! 💙 Wishing you continued success on your journey. ✨
– The 1:1 Diet Team
Fabulous flexible plan that can fit in…
Fabulous flexible plan that can fit in with your life. You can use the steps with food for smaller losses or more steady losses or if you have a bigger weight loss journey the complete meal replacement steps are great to see faster results.
The food products taste amazing too, my favorites are the porridge and bars but there is a huge range to chose from .
26 July 2023
Unprompted review
Reply from The 1:1 Diet by Cambridge Weight Plan
Thank you for your fantastic review! 💙 We love that you’ve found The 1:1 Diet to be a flexible plan that fits into your life. Whether it’s smaller, steady losses or a bigger transformation, the Steps make it easy to find the right approach for you!
It’s great to hear you’re enjoying the products too—our porridge and bars are definitely fan favorites! 😍 Wishing you continued success on your journey. ✨
– The 1:1 Diet Team
It works if you commit
I managed to lose 2 stone on this diet. There are some negative reviews of the experience on here. What I will say is that I was in the right frame of mind to do it. It isn't an easy diet, but if you commit, you will lose the weight. The bars and shakes are good and they help keep you going. My sponsor June helped keep me positive and checked in with me. I would recommend you try it if you are ready to put in the effort, as I have no regrets and feel much better in myself because of it.
26 June 2024
Unprompted review
Reply from The 1:1 Diet by Cambridge Weight Plan
Huge congratulations on your 2 stone weight loss! 🎉💪 You’re absolutely right—mindset and commitment play a big role, and we’re so glad to hear that The 1:1 Diet worked for you. It’s great that you enjoyed the bars and shakes and that your Consultant, June, provided the support and motivation to keep you going.
Thank you for sharing your honest experience and for recommending the plan! We wish you continued success and happiness on your journey. 💙✨
– The 1:1 Diet Team
This Plan Really Does Work .....
This diet works and I really would challenge anyone who says otherwise.
I've tried every diet under the sun and I always give up, lose the will etc and end up heavier than before.
This time I've done this to help my overall well being and health, reduce my BMI and blood pressure and feel better about myself. I'm the lightest I've been in 20 years and back into a size 10 from a 12/14.
It's important to find the right Consultant for you, I have a remote Consultant who is amazing and we check in weekly. Alex initially gave me lots of info about the plan and I then chose to start on step 1b.
In 16 weeks I've lost 2 stone, countless inches and enjoyed 3 weeks of holiday in the sun all inclusive. Yes I put weight on but lost it within 3 weeks.
The food is tasty, I love it all, it's filling and there's a great choice. You just need willpower to stay the course and not just think you can start eating like you did before once you reach your goal. You need to work with your consultant to learn what your body needs to maintain your weight and see it through to the Maintenance part.
Most people who start this struggle with portion control or over eating and this plan helps you get back to eating normally and healthily with the above in mind.
It's not cheap but it's well worth it in my opinion and several of my friends have now started it after seeing my results.
17 June 2024
Unprompted review
Reply from The 1:1 Diet by Cambridge Weight Plan
Wow—what an incredible journey! 🎉 Losing 2 stone in 16 weeks and feeling your best in 20 years is such an achievement, and we’re so happy The 1:1 Diet has helped you improve your overall well-being and health. 💙
You're right—finding the right Consultant, staying committed, and following through to Maintenance is key to long-term success. It’s fantastic to hear that your remote Consultant has been so supportive and that you’ve enjoyed the flexibility of the plan, even while enjoying holidays!
Thank you for sharing your experience and inspiring others to start their journey. We wish you continued success and happiness! ✨
– The 1:1 Diet Team
I lost 8 stone 10 years ago and kept it off
I lost 8 stone almost ten years ago. I am still maintaining my loss and now support hundreds of slimmers to do the same themselves. The plan is in its 40th year supported by the NHS and the British Medical Journal as well as being used in trials by Oxford Uni and Diabetes UK. I love the products personally and still eat them in my maintenance journey… an easy way to eat a high protein diet that’s tasty and convenient! It’s changed my life!
1 June 2024
Unprompted review
Reply from The 1:1 Diet by Cambridge Weight Plan
Losing 8 stone and maintaining it for almost 10 years is such an amazing achievement, and it's inspiring that you're now helping others on their own journeys. 💙
We’re thrilled to hear that The 1:1 Diet has had such a positive impact on your life, and it’s fantastic that you continue to enjoy the products as part of your maintenance plan. Your dedication and ongoing support for other slimmers is truly inspiring!
Thank you for sharing your journey with us and for being such a wonderful ambassador for The 1:1 Diet.✨
– The 1:1 Diet Team
I spent too much money before realising…
I spent too much money before realising that the products are nothing like real food, they almost made me heave. I don't know what I expected but powdery slop was not it. Avoid it but if you want to try only buy a couple of days worth to start you off.
22 April 2024
Unprompted review
Reply from The 1:1 Diet by Cambridge Weight Plan
We’re really sorry to hear that you didn’t enjoy the products and appreciate you sharing your feedback. Our goal is always to provide satisfying and nutritious options that support your weight loss journey. We understand that everyone’s taste preferences are different, and while many people enjoy our range, we acknowledge that it may not be for everyone.
We always recommend trying a small selection of products first to ensure they’re a good fit for you before committing to a larger order.
Thank you for your feedback, and we wish you the best of luck in your health and wellness journey!
– The 1:1 Diet Team
Inedible products with strong chemical taste
Really poor experience. I can cope with the hunger/ headaches as my body adjusts to the change in regime.
The products, however, are vile. With the exception of one shake (Chocolate Mint,) the meals, smoothies and other flavours are really bad - consistency was off (thick and claggy,) and a strong chemical taste (which lasted for hours.)
The bars were ok … only ok… but I couldn’t face living on 3 bars per day.
Unfortunately can’t recommend.
20 March 2024
Unprompted review
Reply from The 1:1 Diet by Cambridge Weight Plan
We’re really sorry to hear that the products didn’t meet your expectations, and we understand how frustrating that can be. We work hard to create a range of tasty and nutritious products, and we appreciate your honest feedback. While many of our customers enjoy the variety we offer, we know that taste can be highly individual, and it’s disappointing to hear that some of the products didn’t suit you.
The ingredients and preparation methods are designed to provide the best possible nutrition and support for weight loss, but we always recommend trying a small selection of products first to ensure they’re the right fit for you.
We appreciate you taking the time to share your experience, and we hope you find a solution that works for you moving forward.
– The 1:1 Diet Team
Avoid Katy in Norwich
I was initially intrigued by this diet and considered purchasing its products. However, my experience took a negative turn when I encountered a pushy distributor who exhibited characteristics typical of a multi-level marketing scheme. To make matters worse, after the distributor left, she made a racist remark. I urge you to steer clear of this company, and instead, consider Weight Watchers as a reputable alternative to their dubious "meal replacement" program. #ConsumerBeware #ChooseWisely
16 December 2023
Unprompted review
Reply from The 1:1 Diet by Cambridge Weight Plan
We are deeply sorry to hear about your experience and take any allegations of inappropriate behavior extremely seriously. The 1:1 Diet by Cambridge Weight Plan prides itself on providing a supportive, ethical, and professional service to all clients. We do not condone any form of discrimination.
Our plan is designed to provide one-to-one support through dedicated, independent Consultants, and we always encourage professionalism and respect in every interaction.
We appreciate you taking the time to share your experience, and we hope you find a solution that works for you moving forward.
— The 1:1 Diet Team
Short term fix
This diet may work in the short term but it is not sustainable. You cannot do this for the rest of your life and as soon as you start eating normal foods again, you will put the weight back on and more.
27 February 2024
Unprompted review
Reply from The 1:1 Diet by Cambridge Weight Plan
Thank you for sharing your thoughts. The 1:1 Diet by Cambridge Weight Plan is designed not just for weight loss but for long-term weight management. While the initial stages focus on structured meal plans, the program includes tailored steps to gradually reintroduce balanced meals, helping individuals develop healthier eating habits for life.
Like any weight loss plan, long-term success depends on maintaining a healthy lifestyle after reaching your goal. Our Consultants provide ongoing support to help clients transition from weight loss to sustainable, balanced eating—so you’re not left to navigate the journey alone.
We appreciate your feedback and wish you the best on your health and wellness journey!
— The 1:1 Diet Team
Amazing
Amazing! Products do not taste at all like diet food and they keep you full. I lost 3 stone in 3 months and have been following their maintenance plan and I'm doing so well. The key is having the consultant who provides you with the support
6 November 2023
Unprompted review
Reply from The 1:1 Diet by Cambridge Weight Plan
Thank you so much for sharing your incredible experience! Huge congratulations on your 3-stone weight loss and for successfully following the maintenance plan—it’s amazing to hear how well you're doing. We completely agree that having the right Consultant makes all the difference, offering support and guidance every step of the way.
Wishing you continued success on your journey, and thank you for being a part of The 1:1 Diet community!
— The 1:1 Diet Team
Absolutely distraught with the lack of support from the 1:1 diet
I was so disappointed with the 1:1 diet. One of the dieticians was very unsupportive and didn’t care that I felt faintish or dizzy by only consuming 800 calories a day. I told her that I didn’t like some of the meals (the pastas and soups) and she kept forcing me to try and eat them. I asked to swop my soups and pastas for shakes and bars because I didn’t want to starve myself and she said it was ‘against their policies’ even though her colleagues have let their clients swop foods before. She was also very rude to me asking me ‘what else do you want me to do?’ When I told her I was feeling dizzy and didn’t like the soups and pastas. Also 800 calories is not healthy to consume in 24 hours, I’ve never felt more dizzy and ill in my life. I wanted to exercise but I was unable to with this diet. I told my dietician that I wanted to increase the calories so I could exercise and she ignored my request. Overall I am very disappointed with this diet and it was all a waste of money, I’d rather eat healthy and exercise at the same time. I would’ve expected my money back if I didn’t consume the disgusting food provided that was sealed and not touched.
1 January 2024
Unprompted review
Reply from The 1:1 Diet by Cambridge Weight Plan
We’re truly sorry to hear about your experience with The 1:1 Diet, as this is not the level of support and care we expect from our Consultants. Your well-being should always come first, and we understand how frustrating it must have been to feel unheard.
Our plan is designed to be flexible, and it’s important that every client feels comfortable with their food choices and calorie intake. While our steps are formulated to provide complete nutrition, we recognise that different people have different needs. Increasing calories for those who wish to exercise is absolutely an option, and your Consultant should have worked with you to find a step that suited you better.
We appreciate your feedback and wish you the best on your health and wellness journey!
– The 1:1 Diet Team
Been on the diet for neary 7 weeks and…
Been on the diet for neary 7 weeks and have lost over 30lbs! It definately works..I was worried about the products but they all taste A-Mazing! Feel like I have new lease of life! Lost one star as my consultant isn't the best, no proper contact each week (unless there are some new products to sell me), I was expecting a weekly call as I feel its included in the costs (which are pretty high!), but other than a few 'motivational' quotes there isn't anything!
1 December 2023
Unprompted review
These company’s are LYING to everyone about health benefits!!
These companies are lying to you. My girlfriend told me she wanted to lose some extra weight and was going to try out this 1:1 diet plan. I said oh really sounds lovely, send me over the INGREDIENTS list. So I checked them this morning, and unsurprisingly every single product they sell is ABSOLUTELY FULL OF CHEMICALS. There is nothing natural about these diet plans, it’s not real food, don’t believe their lies and marketing tactics. They are full of STABILISERS, THICKENERS, ARTIFICIAL SWEETENERS, AGENTS, EMULSIFIERS. This will make you ill later in life, destroy your mental health and give you cancer. Do not buy this!
27 September 2023
Unprompted review
Reply from The 1:1 Diet by Cambridge Weight Plan
I’m sorry you feel that way about our products, but to say we are lying is simply incorrect, and your statement that our products will make you ill is not just wrong, but the opposite is true. You question the health outcomes of our diet and are sceptical of the ingredients. I’ll address both subjects below.
Firstly, The 1:1 Diet has more research showing its effectiveness, safety and health benefits than just about any other diet you can think of. I’ve added a sample of links to our most recent research below so you can evaluate some of the actual studies yourself if you like.
These and other studies show that our diet is effective at causing rapid, substantial weight loss, along with improvements in nutritional status, and, the hard part, with excellent long-term maintenance of that weight loss. The health benefits are at least as impressive.
The diet has been shown to reverse diabetes in about half of research subjects, and that’s despite ceasing their diabetes and blood pressure medication at the outset of the studies. In addition, The 1:1 Diet also elicits benefits such as reduced blood pressure, cardiovascular disease risk, sleep apnoea, osteoarthritis pain, inflammation and other clinical improvements (again, see studies below).
Regarding your concerns about our ingredients, most of those that are hard to pronounce are essential vitamins, minerals or fibres – the same ones found in thousands of other foods.
For instance, you might be concerned with a food that contains things like 2-methylbutyl ethanoate, palmitoleic acid, tryptophan, phytosterols and E numbers like E460, E515 potassium sulphate, E101 yellow-orange…along with 30 other “chemicals”. Well, the food that contains these constituents is a banana, so in that context, shouldn’t we look at each ingredient on its merits and not because it is hard to pronounce?
Sincerely,
Mark Gilbert B.Sc., RNutr, CISSN
Commercial Nutritionist
The 1:1 Diet by Cambridge Weight Plan
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10171640/
https://www.ncbi.nlm.nih.gov/pubmed/20206314
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3553637/
https://www.bmj.com/content/342/bmj.d3017.long
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3321436/
https://pubmed.ncbi.nlm.nih.gov/27334236/
https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(17)33102-1/fulltext
https://www.thelancet.com/journals/landia/article/PIIS2213-8587(20)30117-0/fulltext
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6282840/
https://www.nature.com/articles/s41366-021-00915-1
https://pubmed.ncbi.nlm.nih.gov/30852132/
https://pubmed.ncbi.nlm.nih.gov/28747328/
https://www.ncbi.nlm.nih.gov/pubmed/29221645
https://drc.bmj.com/content/8/1/e001012
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6282840/
https://onlinelibrary.wiley.com/doi/10.1111/jhn.12938
https://onlinelibrary.wiley.com/doi/10.1111/dme.14689
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3321436/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5199119/
https://pubmed.ncbi.nlm.nih.gov/33356944/
Works, at first
Works, at first. I first did this diet in 2015 in the run up to my wedding. I lost over 3 stone. After my wedding i 'put on' a few lbs - probably just water weight in hindsight. Every time i went up just a few lbs i would panic and go back on it - not once did my consultant say I was being ridiculous. I then again went back on it in 2017 after having my first baby, was the lightest i have ever been - would love to be that weight again - but i was starving. After my 2nd baby my weight had gone back to my original weight in 2015. i tried the diet twice but was so sick of the products, and the weight took longer to shift, even just a few lbs. I am now on slimming world and lost 6lbs in two weeks. I have been eating, ive still enjoyed a weekend abroad with lots of food and wine! this fits in with life so much better. Cambridge does not work in the long run and will make you miserable. maybe the same will happen with SW, but so far its a million times better.
21 September 2023
Unprompted review
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