Three Sisters Beat the Odds, Shedding More Than 18 Stone Collectively on Shared Weight Loss Plan
In a compelling display of determination and mutual support, three sisters from Abingdon, Oxfordshire have collectively lost over 18 stone—equivalent to 114kg—after embarking on a low-calorie diet that has transformed both their bodies and perspectives on health. Facing health scares such as the threat of diabetes, hypertension, and even risk of blindness, the siblings joined forces to implement critical lifestyle changes, discovering newfound vigour and confidence along the way.
Emma Castle, aged 48, realised her health was teetering on the brink in the summer of 2023, after a visit to her GP revealed high blood pressure and early signs of diabetes. Weighing her heaviest at 22 stone 6lb and wearing size 24 clothing, Emma felt compelled to act decisively. By January 2024, she chose to adopt the 1:1 Diet by Cambridge Weight Plan—a structured meal replacement programme built around just 800 calories a day and heavily guided by personal consultant support.
Today, Emma’s weight has dropped to 14 stone 6lb, and she now fits comfortably into a size 16. Everyday activities, which once posed substantial challenges, have become manageable. “I can walk further, finish household chores more easily, and even fit into public transport seats without discomfort,” Emma confided. Inspired by her journey, she has since become a consultant for the 1:1 Diet, eager to help others navigate similar struggles.
Emma’s transformation became a catalyst for her sisters. Tammy Fisher, 46, found herself at a crossroads, weighing 16 stone 5lb and feeling increasingly isolated by her dissatisfaction with her appearance. She seriously considered gastric surgery, accounting for both emotional and financial costs, before deciding to follow Emma’s lead. Embracing the same 800-calorie plan, Tammy has lost over five-and-a-half stone, now fitting into a size 12, and describes the experience as regaining control. “I thought surgery was the only way forward, but the results have been nothing short of incredible,” she says. Tammy has also gone on to become a consultant, joining Emma in encouraging others.
Katie Nutt, also 46, who is not currently working due to health concerns, joined her sisters’ journey in February 2024, initially weighing 17 stone 4lb and wearing a size 22. Living with a rare form of hypertension affecting her brain, Katie needed to reduce her weight to alleviate symptoms and avoid a potential loss of vision. Since adopting the plan, she has shed more than five stone and her health has stabilised, particularly relating to her eyesight and daily pain levels.
The siblings agree that their shared endeavour has brought them closer. “We’ve replaced food-focused celebrations with shared experiences and holidays,” Emma observed. “It’s not just about what we’ve lost on the scales, but about what we’ve gained in quality of life.” The camaraderie and accountability amongst the trio were pivotal in navigating the tough initial period of adapting to the calorie deficit, when light-headedness and fatigue were common hurdles.
Although the restrictive plan may invite scepticism, Emma and her sisters credit the closely monitored step-by-step structure—and the ongoing support from each other and their consultants—for keeping them committed and safe throughout the process. The programme initially involves replacing all meals with formulated products before gradually reintroducing whole foods and increasing daily calorie intake, with a final goal of maintaining a healthy, active lifestyle.
Now, with Emma’s BMI moving from 57 to 36, Tammy’s reducing to 28, and Katie’s resting at 30, significant improvements in medical markers and self-esteem have followed. All three are quick to point out the mental adjustment required, admitting their body image still lags behind the physical changes.
Looking ahead, the sisters intend to continue supporting each other as they transition to the latter stages of the plan, which includes eating a balanced 1,500-calorie diet alongside regular activity. Emma and Tammy are already looking forward to guiding others as official consultants, while Katie enjoys her renewed relationship with her children and the opportunity to take part in daily life without limits.
Health professionals encourage anyone considering significant weight loss to consult their GP before starting a new diet regimen. Resources and support for weight management and eating disorders are available through the NHS and specialist organisations such as Beat.
The three sisters’ story underscores the transformative power of solidarity, determination, and expert support—an example they hope will inspire others with similar journeys ahead.