
The 800-calorie diet is a very low-calorie diet (VLCD) that aims to cut down daily calorie intake from the usual 2,000 calories to 800 calories. It is believed that this diet can aid in weight loss, improve energy levels, and control diabetes. The diet typically involves a nutritionally balanced breakfast rich in protein, fibre, and complex carbohydrates, followed by a light lunch, and a nutritious yet low-calorie dinner. While some sources claim that this diet can be effective in managing type 2 diabetes, it is important to consult a healthcare professional before starting any new diet, especially one as restrictive as this.
| Characteristics | Values |
|---|---|
| Purpose | Promote rapid weight loss, boost sleep quality and energy levels, reduce inflammation and risk of hypertension and type 2 diabetes |
| Who it is for | People who are obese or have diabetes, hypertension |
| Calorie intake | 800 calories per day |
| Meal replacement | Soups and shakes |
| Safety | Safe when supervised by a registered dietician or healthcare professional |
| Best for | People who are overweight or obese |
| Duration | 2–12 weeks |
| Results | Reverses type 2 diabetes, regulates blood sugar levels, lowers blood pressure |
| Side effects | Hunger, dizziness, irritability |
| Long-term effects | Negative effects if continued beyond 12 weeks |
| Exercise | Recommended |
| Food type | Mediterranean-style, low-carb, nutritionally balanced |
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What You'll Learn
- The 800-calorie diet is a very low-calorie diet (VLCD)
- It can aid weight loss, improve energy, and control diabetes
- It involves a nutritionally balanced breakfast, light lunch, and nutritious dinner
- It is not recommended for everyone and can be overwhelming
- It is a proven method for weight loss and type 2 diabetes remission

The 800-calorie diet is a very low-calorie diet (VLCD)
The 800-calorie diet is sometimes recommended for people with type 2 diabetes, as it can help improve blood sugar control and even achieve remission. Research suggests that rapid weight loss is an effective way to reverse type 2 diabetes for those who are overweight. The 800-calorie diet can be particularly effective in this regard, with some studies showing that almost half of diabetic volunteers achieved remission after five months on the diet. Additionally, the diet may help lower blood pressure and reduce the risk of hypertension.
It is important to note that the 800-calorie diet is not suitable for everyone and should be undertaken with caution. It is always recommended to consult a healthcare professional before starting any new diet, especially one as restrictive as this. A healthcare team can help determine if the diet is safe and appropriate for an individual's needs and can provide guidance on balancing nutrient intake. For those with a high BMI (over 40), it is generally recommended to taper down to 800 calories instead of starting the diet abruptly.
The 800-calorie diet can be challenging, and it is common to experience hunger, dizziness, and irritability during the initial days. After a few days or weeks, the body typically adjusts to the new diet, and ketosis can help reduce feelings of hunger. However, staying on the diet for longer than 12 weeks may lead to negative effects on the body.
The Fast 800 Programme is a popular example of an 800-calorie diet plan designed to help manage blood sugar levels and promote weight loss. The programme offers meal plans, exercise routines, and support from health coaches. It emphasises a moderately low-carb, Mediterranean-style diet to ensure adequate nutrition while controlling calorie intake.
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It can aid weight loss, improve energy, and control diabetes
An 800-calorie diet is a very low-calorie diet (VLCD) that can aid weight loss, improve energy levels, and control diabetes. It involves consuming a total of 800 calories per day, a drastic cut from the usual 2,000 calories recommended for women and 2,500 for men. While it is not a healthy option for everyone, an 800-calorie diet can be safe and effective when followed under the guidance of a healthcare professional or a programme like Habitual.
Weight loss is a common goal for those seeking to control or reverse type 2 diabetes. An 800-calorie diet can promote rapid weight loss, which has been linked to putting type 2 diabetes into remission. The Diabetes Intervention Accentuating Diet and Enhancing Metabolism (DIADEM-I) trial found that a total diet replacement of an 800-calorie liquid formula led to type 2 diabetes remission in some participants. Similarly, the DiRECT trial showed that almost half of volunteers with diabetes who followed an 800-calorie diet were no longer considered diabetic after five months.
The Fast 800 Programme is another guided programme that provides nutritionist-developed meal plans based on a moderately low-carb, Mediterranean-style diet. This approach ensures adequate protein, healthy fats, and fibre, helping individuals feel fuller for longer. The programme also includes evidence-based exercise plans, which, alongside dietary interventions, can improve insulin sensitivity and blood sugar levels.
An 800-calorie diet typically includes a nutritionally balanced breakfast rich in protein, fibre, and complex carbohydrates, followed by a light lunch, and a nutritious yet low-calorie dinner. Fenugreek-soaked water and green tea are also recommended for their weight loss effects. While this diet can be challenging, with individuals likely to experience hunger, dizziness, and irritability, these side effects often subside as the body adjusts to the new diet.
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It involves a nutritionally balanced breakfast, light lunch, and nutritious dinner
An 800-calorie diet is a very low-calorie diet (VLCD) that can aid in weight loss, improve energy levels, and control diabetes. It is important to note that this diet should be supervised by a registered dietician and is not recommended for everyone. The diet typically involves a nutritionally balanced breakfast rich in protein, fibre, and complex carbohydrates, followed by a light lunch, and a nutritious yet low-calorie dinner.
A nutritionally balanced breakfast is essential to starting the day right on an 800-calorie diet. This might include yoghurt with passion fruit and almonds, providing protein and healthy fats, with a calorie count of around 170. Another option is beetroot, apple, and cannellini bean soup, which is approximately 200 calories per serving and can be made in bulk and frozen. This soup is high in fibre and vitamins, with the addition of cumin seeds and onions providing flavour and additional nutrients.
Light lunch options are important to keep calories low while still providing nourishment. One option is to focus on green tea, which has no calories and is a good source of antioxidants, helping to flush out toxins from the body.
For dinner, it is important to focus on nutritious yet low-calorie options. Kale, pomegranate, and quinoa are great choices as they are loaded with vitamins, minerals, and dietary fibre, keeping you feeling full for longer.
In addition to these meals, the 800-calorie diet also recommends drinking fenugreek-soaked water, as fenugreek seed water can increase insulin sensitivity and reduce the risk of type 2 diabetes. It is also suggested to drink green tea throughout the day for its weight loss effects.
The 800-calorie diet is a significant lifestyle change and should not be undertaken lightly. It is important to consult with a healthcare professional before starting any new diet, especially one as restrictive as this.
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It is not recommended for everyone and can be overwhelming
An 800-calorie diet is a very low-calorie diet (VLCD) that involves consuming a total of 800 calories per day. While it can be effective for weight loss and controlling diabetes, it is not recommended for everyone and can be overwhelming.
Firstly, it is important to note that a very low-calorie diet typically involves consuming approximately 400-800 calories per day. This is a significant reduction from the usual 2000 calories per day that many people consume. As such, transitioning to an 800-calorie diet can be a drastic change and may not be suitable for everyone.
Additionally, the 800-calorie diet is not a one-size-fits-all approach. Individual needs vary, and it is important to consult a healthcare professional before starting any new diet, especially one as restrictive as this. For example, those with a high BMI (over 40) are advised to taper their diet down gradually rather than immediately restricting calories to 800 per day. Similarly, those taking insulin or other diabetes medications should speak to their healthcare team before making any significant dietary changes.
The 800-calorie diet can also be overwhelming due to the potential for negative side effects. In the initial days and weeks of the diet, individuals may experience hunger, dizziness, and irritability. While these symptoms may subside as the body adjusts, negative effects may occur if the diet is continued for too long. Therefore, it is generally recommended that the 800-calorie diet be followed for a limited duration, typically around 12 weeks, to avoid potential health risks.
Furthermore, the 800-calorie diet may not be sustainable or suitable for everyone's lifestyle. It requires careful planning and monitoring to ensure nutritional requirements are met, and it may not align with everyone's budget, preferences, or daily routine.
In conclusion, while an 800-calorie diet can be effective for weight loss and diabetes management, it is not recommended for everyone and can be overwhelming due to its restrictive nature, potential side effects, and the need for careful planning and monitoring. It is always advisable to consult a healthcare professional before starting any new diet to ensure it is safe and appropriate for your individual needs.
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It is a proven method for weight loss and type 2 diabetes remission
An 800-calorie diet is a very low-calorie diet (VLCD) that involves drastically cutting down one's calorie intake from the usual 2,000 calories a day. It typically consists of a nutritionally balanced breakfast rich in protein, fibre, and complex carbohydrates, followed by a light lunch, and a nutritious yet low-calorie dinner. Some versions of the diet also recommend drinking fenugreek-soaked water and green tea for their weight loss effects.
The 800-calorie diet is a proven method for weight loss and type 2 diabetes remission. Evidence shows that this approach gives people the best chance of losing weight through diet, which is key to type 2 diabetes remission for many. The Diabetes Intervention Accentuating Diet and Enhancing Metabolism (DIADEM-I) trial is an RCT that examined T2D remission as a primary endpoint. The trial recruited 147 overweight adults aged 18-50 with a BMI of 27 kg/m2 or greater and an average T2D duration of fewer than three years. The trial defined T2D remission as having an HbA1c of less than 6.5% (<48 mmol/mol) and being free of antidiabetic medications for at least three months. After the trial, almost half of the participants were no longer considered to have type 2 diabetes.
The 800-calorie diet can also help manage type 2 diabetes, hypertension, and obesity. It is important to note that this diet should be supervised by a registered dietician and is not recommended for everyone. Those with a high BMI (over 40) should taper their diet down to 800 calories instead of jumping straight into it. Additionally, it is recommended that individuals consult their doctor or healthcare team before starting this diet, especially if they are taking insulin or other diabetes medications.
The Fast 800 Programme is a popular example of an 800-calorie diet plan. It provides nutritionist-developed meal plans with over 700 moderately low-carb, Mediterranean-style recipes. The programme also includes evidence-based exercise plans and access to professionally qualified health coaches. The programme is available as an app or desktop version.
The 800-calorie diet is a safe and effective method for weight loss and type 2 diabetes remission when properly supervised and tailored to individual needs. It is important to consult with healthcare professionals before starting this or any other diet to ensure safety and effectiveness.
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Frequently asked questions
An 800-calorie diet is a very low-calorie diet (VLCD) and is not recommended for everyone. It is always best to consult a healthcare professional before starting a diet, especially if you have a medical condition such as diabetes. However, there is evidence that an 800-calorie diet can be an effective way to manage type 2 diabetes and even send it into remission.
An 800-calorie diet helps with diabetes by promoting rapid weight loss. Research suggests that rapid weight loss is the most efficient method of reversing type 2 diabetes for those who are overweight.
An 800-calorie diet usually consists of a nutritionally balanced breakfast rich in protein, fibre, and complex carbohydrates, followed by a light lunch, and a nutritious yet low-calorie dinner. Some sources recommend drinking fenugreek-soaked water and green tea for their weight loss effects.
Most sources recommend following an 800-calorie diet for 12 weeks or three months. This is considered enough time to achieve significant weight loss, which is the target for putting type 2 diabetes into remission.











































