Research shows that low-calorie formula diet programs can help reverse early-stage type 2 diabetes through weight loss, and most people find these diets acceptable and tolerable. According to Gram Research analysis of 15 studies, the main motivators for success are the possibility of reversing diabetes and losing weight, with additional benefits including improved physical and mental wellbeing. However, long-term success requires consistent education, mental health support, and programs tailored to cultural needs, areas where current programs often fall short.
A new review of 15 studies shows that people with early-stage type 2 diabetes can actually reverse their condition by losing weight through special low-calorie formula diets. These diets replace regular meals with specially designed drinks and shakes for a set period. Most people found these diets acceptable and tolerable, and they were motivated by the chance to reverse their diabetes and lose weight. However, the research also found that people need better education, mental health support, and programs that respect different cultures to succeed long-term. According to Gram Research analysis, understanding how people experience these diets is key to helping them maintain healthy habits after the program ends.
Key Statistics
A 2026 scoping review of 15 studies found that low-calorie and very-low-calorie formula diet programs were generally acceptable to people with type 2 diabetes, with the primary motivation for adherence being the potential to reverse their diabetes through weight loss.
According to the 2026 scoping review, participants reported improvements in both physical wellbeing (energy, sleep, mobility) and psychological wellbeing (mood, anxiety, confidence) as they progressed through low-calorie formula diet programs for type 2 diabetes.
The 2026 review identified that inconsistent education delivery, insufficient psychological support, and limited consideration of cultural needs were key challenges preventing some people from succeeding with low-calorie formula diet interventions for type 2 diabetes.
The Quick Take
- What they studied: How people experience and handle low-calorie formula diet programs designed to help reverse type 2 diabetes through weight loss
- Who participated: The review examined 15 different studies involving people with type 2 diabetes who tried low-calorie or very-low-calorie formula diet programs. The studies varied in size and included different populations, though most samples were relatively small and similar to each other
- Key finding: Most people found low-calorie formula diets acceptable and tolerable, with the main reasons for sticking with the program being the hope of reversing diabetes and losing weight. As people progressed through the program, they also noticed improvements in how they felt physically and mentally
- What it means for you: If you have early-stage type 2 diabetes, a low-calorie formula diet might help you reverse your condition through weight loss. However, success depends on getting good education, mental health support, and programs tailored to your culture and needs. Talk to your doctor before starting any major diet change
The Research Details
Researchers looked at 15 published studies about people’s experiences with low-calorie and very-low-calorie formula diet programs for type 2 diabetes. They searched five major research databases from the beginning of available records through February 2026, following strict guidelines to make sure they included only high-quality studies. A scoping review is like a wide-angle snapshot of what research exists on a topic, rather than a deep dive into one specific question.
The researchers wanted to understand what people actually thought about these diets, what helped them stick with the programs, and what made the programs hard to follow. They looked at both the positive experiences (like weight loss and diabetes improvement) and the challenges people faced (like not getting enough support or education). By reviewing all these studies together, they could see patterns in what worked and what didn’t across different programs and populations.
Understanding how people actually experience these diets is just as important as knowing whether the diets work scientifically. A diet might be proven effective in research, but if people find it too hard to follow or don’t get the right support, they won’t succeed. This review helps doctors and program designers understand what real people need to make these programs work long-term, not just during the intensive diet phase. It also highlights gaps in current programs, like the need for better mental health support and programs that respect different cultural backgrounds and food preferences.
This is a scoping review, which means it gives a broad overview of what research exists rather than a definitive answer. The individual studies included varied in quality and size, with most having small numbers of participants. The researchers followed strict guidelines (PRISMA-ScR) to make sure they found and evaluated studies fairly. However, because the studies were small and included similar types of people, the findings may not apply equally to everyone. The review is recent (through February 2026) and comprehensive, covering multiple databases, which strengthens its reliability
What the Results Show
Across all 15 studies reviewed, low-calorie and very-low-calorie formula diets were generally acceptable to people with type 2 diabetes, and the formula products themselves were well tolerated with few complaints about taste or side effects. The strongest motivator for people to stick with these intensive programs was the possibility of actually reversing their type 2 diabetes, combined with the goal of losing weight. This is significant because it shows that people are willing to follow challenging diets when they understand the potential benefit.
As people progressed through their programs, they began noticing benefits beyond just weight loss and diabetes control. They reported feeling better physically (more energy, better sleep, improved mobility) and mentally (better mood, reduced anxiety, improved confidence). These broader improvements in quality of life became increasingly important to people as they continued with the program, suggesting that the benefits extend far beyond just the numbers on a scale or blood sugar readings.
However, the research also identified several important challenges that prevented some people from succeeding. Many participants reported receiving inconsistent or unclear education about how to follow the diet properly and what to expect. Others felt they lacked adequate psychological support, such as counseling or mental health check-ins, which made it harder to stay motivated during difficult periods. Additionally, many programs didn’t account for cultural differences in food preferences, eating traditions, or family meal practices, which made the diets feel disconnected from people’s real lives.
The review found that understanding what happens after the intensive diet phase ends is a major gap in current research. Most studies focused on the period when people were actively following the formula diet, but very few tracked what happened when people returned to regular food and had to maintain their weight loss and diabetes remission on their own. This is a critical issue because maintaining long-term success is often harder than achieving initial weight loss. The research also showed that most studies included relatively small and similar groups of people, which means the findings may not apply equally to people from different backgrounds, ages, or with different types of diabetes complications
This review builds on growing scientific evidence that type 2 diabetes is not necessarily a permanent condition. Previous research has shown that substantial weight loss can lead to diabetes remission, but this review adds important new information about what people actually experience during these programs and what helps or hinders their success. The findings align with earlier research showing that motivation and psychological factors are crucial for diet adherence, but this review specifically highlights that people need tailored support based on their cultural background and individual circumstances. The emphasis on the need for better education and mental health support reflects a broader shift in diabetes care toward more holistic, person-centered approaches
The main limitation is that the 15 studies included in this review had relatively small numbers of participants and mostly included similar types of people, which means the findings may not apply equally to everyone with type 2 diabetes. The studies also varied widely in how they measured success and what information they collected about people’s experiences, making it harder to compare results directly. Additionally, most studies focused on the intensive diet phase and provided limited information about what happens long-term after people finish the program and return to regular eating. The review also couldn’t assess the quality of each individual study in detail, so some included studies may have been stronger than others. Finally, because this is a scoping review rather than a systematic review with statistical analysis, it provides an overview of what research exists but doesn’t provide definitive answers about how effective these programs are overall
The Bottom Line
If you have early-stage type 2 diabetes and are interested in trying a low-calorie formula diet program, research shows these diets are generally acceptable and can help reverse diabetes through weight loss. However, success depends on several factors: choose a program that provides clear, consistent education about how to follow the diet; look for programs that include mental health support or counseling; and seek programs that respect your cultural food preferences and family eating traditions. Work closely with your doctor throughout the program to monitor your blood sugar and overall health. Be prepared for the transition back to regular food, as maintaining your results long-term requires ongoing lifestyle changes. Confidence level: moderate, based on consistent findings across multiple studies, though more research is needed on long-term outcomes
These findings are most relevant for people with early-stage type 2 diabetes who are interested in reversing their condition through weight loss. They’re also important for doctors, diabetes educators, and program designers who want to understand what support people actually need to succeed. If you have advanced type 2 diabetes with complications, are pregnant, have a history of eating disorders, or take certain medications, talk to your doctor before considering these programs. People from diverse cultural backgrounds should seek programs that respect their food traditions and family practices
Most studies tracked people for 3 to 12 months during the intensive diet phase. Weight loss typically begins within the first few weeks, and improvements in blood sugar control often follow within 1 to 3 months. However, the research shows limited information about what happens beyond 12 months, so realistic expectations for long-term success are unclear. Maintaining results likely requires ongoing lifestyle changes and support beyond the initial program
Frequently Asked Questions
Can type 2 diabetes actually be reversed with diet?
Research shows that early-stage type 2 diabetes can be reversed through substantial weight loss using low-calorie formula diet programs. However, this requires significant weight loss and ongoing lifestyle changes to maintain remission long-term. Talk to your doctor about whether this approach is appropriate for your specific situation
What makes people stick with low-calorie diet programs for diabetes?
The strongest motivators are the possibility of reversing diabetes and achieving weight loss. As people progress, they also become motivated by improvements in how they feel physically and mentally, such as better energy, sleep, and mood. However, people need consistent education and mental health support to maintain motivation
What are the main problems with these formula diet programs?
Common challenges include inconsistent or unclear education about how to follow the diet, lack of mental health support or counseling, and programs that don’t respect cultural food preferences and family eating traditions. There’s also limited research on what happens long-term after people finish the program and return to regular food
How long does it take to see results from a low-calorie formula diet?
Weight loss typically begins within the first few weeks, and improvements in blood sugar control often follow within 1 to 3 months. Most studies tracked people for 3 to 12 months during the intensive phase, but there’s limited research on maintaining results beyond that timeframe
Is a low-calorie formula diet safe for everyone with type 2 diabetes?
These diets are generally well tolerated, but they’re not appropriate for everyone. People with advanced diabetes complications, pregnant individuals, those with a history of eating disorders, or people taking certain medications should talk to their doctor first before starting any major diet change
Want to Apply This Research?
- Track daily adherence to the formula diet program (percentage of meals replaced), weekly weight, and weekly blood sugar readings if available. Also track mood and energy levels on a simple 1-10 scale to monitor the psychological and physical benefits people reported in the research
- Use the app to set a specific motivation reminder based on your personal reason for the program (diabetes remission, weight loss, or improved wellbeing). Log daily check-ins about which challenges you faced and what support you needed, so you can identify patterns and ask your doctor or program coordinator for help in those specific areas
- Create a transition plan in the app for moving from the formula diet back to regular food, with specific goals for maintaining weight loss and diabetes remission. Track long-term adherence to healthy eating habits and regular physical activity, with monthly check-ins on blood sugar control and overall wellbeing to catch any backsliding early
This article summarizes research findings and is not medical advice. Low-calorie and very-low-calorie formula diets are intensive interventions that should only be undertaken under medical supervision. Before starting any diet program for type 2 diabetes management, consult with your doctor or a registered dietitian to ensure it’s appropriate for your individual health status, medications, and medical history. This is especially important if you have diabetes complications, take insulin or other medications, are pregnant, have a history of eating disorders, or have other chronic health conditions. The findings in this review are based on studies with small sample sizes and limited long-term follow-up data, so individual results may vary. Do not stop taking diabetes medications without explicit guidance from your healthcare provider
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.