
Bariatric surgery is a weight-loss procedure for people who are obese and suffering from related side effects such as high blood pressure, diabetes, and heart disease. The decision to undergo this surgery is not easy, and patients must commit to a lifestyle change of eating the right foods in the right portions, losing weight, and keeping it off for life. This change must begin before surgery and continue afterward. The immediate post-surgery diet is very restrictive and should not be followed without medical approval. However, the long-term bariatric diet—a balanced diet based on planning meals with key food groups—should be safe for most people to follow, provided it is adjusted to their optimal calorie intake.
| Characteristics | Values |
|---|---|
| Safety | The short answer is no, it is not safe to follow a bariatric diet without surgery |
| Diet type | Very restrictive |
| Calorie intake | Between 900 and 1,000 calories per day |
| Medical supervision | Should only be followed under medical supervision |
| Long-term diet | Should be safe for most people to follow a version of it |
| Doctor's advice | It is always best to talk to your doctor before making long-term lifestyle changes |
| Weight loss | Overly restrictive diets are not the safest or most effective ways to lose weight |
| Weight loss methods | Diet and exercise |
| Surgery diet | Designed to help your stomach recover after surgery |
| Stomach size | Very small, less than 1/4 cup, or about the size of an egg |
| Food consistency | Only two to three sips or bites at a time of any new food |
| Food groups | Eat protein at every meal |
| Food portions | Eat the majority of protein first so you can meet your protein goals |
| Food tolerance | Over time, you will be able to increase the variety and consistency of foods in your diet |
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What You'll Learn
- Bariatric surgery diets are very restrictive and should only be followed under medical supervision
- A long-term bariatric diet should be safe for most people to follow, but it's best to speak to a doctor first
- Weight loss coaching can help you follow a diet and exercise plan
- Weight loss drugs are an option, but they should be approved by a medical professional
- Bariatric surgery patients must commit to a lifestyle change of eating the right foods in the right portions

Bariatric surgery diets are very restrictive and should only be followed under medical supervision
The immediate post-surgery diet is a liquid diet, gradually progressing to solid foods over a few weeks. This diet is essential to helping the stomach heal after surgery and should not be followed without medical approval. The stomach is very small after surgery—about the size of an egg—so patients must take small sips or bites of food and wait 10 minutes before taking more. This diet restricts calories, fats, and sweets, and patients are advised to avoid certain foods like raw vegetables, fresh fruits, and meats that are not easily chewed.
The long-term bariatric diet, which patients follow after recovering from surgery, is a balanced diet based on key food groups and typically involves eating between 900 and 1,000 calories per day. While it should be safe for most people to follow a version of this diet adjusted to their optimal calorie intake, it is still important to consult a doctor or healthcare provider before making any long-term dietary changes.
In the lead-up to bariatric surgery, patients are also advised to make dietary changes and lose weight, typically in consultation with a dietitian. This pre-surgery diet is designed to reduce liver size, making surgery easier to perform, and to improve the chances of success after surgery.
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A long-term bariatric diet should be safe for most people to follow, but it's best to speak to a doctor first
Bariatric surgery is a weight-loss procedure for people who are obese and suffering from related side effects such as high blood pressure, diabetes, and heart disease. The decision to undergo this surgery is not easy, and it requires a commitment to a lifestyle change, including eating the right foods and portions, losing weight, and keeping it off long-term.
After bariatric surgery, patients must follow a strict diet to help their stomachs recover. This starts as a liquid diet and gradually introduces solid foods over a few weeks. This post-surgery diet should not be followed without medical approval.
Once patients have recovered from surgery, they transition to a long-term bariatric diet. This diet is based on planning meals with key food groups, and patients typically aim for between 900 and 1,000 calories per day. This diet aligns with healthy eating guidelines and should be safe for most people to follow, with adjustments made to their optimal calorie intake. However, it is always best to consult a doctor before making long-term lifestyle changes. A doctor can advise on the healthiest route forward based on an individual's needs and medical history.
The long-term bariatric diet focuses on balanced meals with small portions, limiting calories, fats, and sweets. It involves eating slowly and thoroughly chewing small bites of food. Certain foods should be avoided, such as raw vegetables, fresh fruits, and meats that are not easily chewed, like pork and steak. It is also important to take supplements, including a daily multivitamin and mineral supplement, and additional iron, calcium, and vitamin D if required.
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Weight loss coaching can help you follow a diet and exercise plan
While bariatric surgery patients are advised to follow a strict diet before and after the operation, it is not recommended to follow a bariatric surgery diet without medical supervision. However, weight loss coaching can be a great way to help you follow a diet and exercise plan.
Weight loss coaching provides professional guidance and support to help you achieve your weight loss goals. A coach can offer personalised advice and strategies tailored to your unique needs and preferences. They can also provide accountability and motivation to help you stay on track with your diet and exercise plan.
One of the key benefits of weight loss coaching is that it offers a structured approach to weight loss. Your coach will work with you to create a customised plan that takes into account your current lifestyle, dietary preferences, and fitness level. They can help you set realistic goals and make gradual, sustainable changes to your diet and exercise habits.
For example, a weight loss coach can help you navigate the challenges of sticking to a calorie-controlled diet. They can provide guidance on portion control, meal planning, and making healthier food choices. They can also suggest strategies for dealing with cravings and avoiding unhealthy snacks. Additionally, a weight loss coach can offer advice on incorporating physical activity into your routine, whether it's suggesting workouts, recommending fun exercises that you enjoy, or simply encouraging you to move more throughout the day.
Furthermore, weight loss coaching often involves developing a comprehensive understanding of your relationship with food. This may include exploring your emotional triggers for eating, improving your mindset around healthy eating, and helping you develop a positive body image. By addressing the psychological aspects of weight loss, coaching can empower you to make long-term behavioural changes and develop a healthier relationship with food.
Weight loss coaching can be a valuable tool to help you stay motivated, accountable, and informed throughout your weight loss journey. It is important to remember that everyone's experience is unique, and what works for someone else may not work for you. By seeking professional guidance and tailoring your approach, you can increase your chances of success in achieving your weight loss goals and improving your overall health.
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Weight loss drugs are an option, but they should be approved by a medical professional
While it is not recommended to follow a bariatric diet without surgery, weight loss drugs are an option for those looking to lose weight. However, it is important to consult a medical professional before taking any weight loss medication, as they are not suitable for everyone.
There are several types of weight-loss medications approved in certain countries, such as the UK and the US. These include over-the-counter tablets like Alli, and prescription weight loss injections like Wegovy, Mounjaro, and Saxenda. The US Food and Drug Administration (FDA) has approved a few weight management medications for children aged 12 and older, including orlistat (Xenical), liraglutide (Saxenda), phentermine-topiramate (Qsymia), and semaglutide (Wegovy). Setmelanotide (Imcivree) is another option approved by the FDA for children aged 6 and older with rare genetic disorders that cause obesity.
It is important to note that weight loss drugs are not a standalone solution and should be combined with lifestyle changes, such as a healthy diet and regular exercise, to achieve sustainable results. The federal physical activity guidelines recommend at least 150 minutes a week of moderate-intensity aerobic activity and a minimum of two days a week of muscle-strengthening activities to support weight loss goals. Additionally, some weight loss medications may have side effects, and it is important to be aware of these before starting any treatment.
Before starting any weight loss program or medication, it is crucial to consult a healthcare professional to determine the best and safest approach for your individual needs. They will consider your medical history, current health status, and lifestyle to advise you on the most appropriate treatment plan, which may or may not include weight loss drugs.
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Bariatric surgery patients must commit to a lifestyle change of eating the right foods in the right portions
Bariatric surgery is a weight-loss procedure that reduces the size of the stomach. Following surgery, patients must adhere to a strict diet to aid their recovery and maintain long-term health. This diet typically begins with clear liquids and gradually progresses to blended, puréed, and eventually solid foods. It is crucial for patients to eat slowly, taking small bites and waiting between mouthfuls.
The long-term bariatric diet focuses on balanced meals with small portions, emphasising low-calorie, low-fat, and low-sugar foods. Patients are encouraged to include various food groups in their meals and ensure adequate hydration. It is recommended to consume between 900 and 1,000 calories per day, carefully tracking food portions, calorie intake, and protein consumption. This approach helps prevent nutrient deficiencies and preserves muscle tissue.
Some foods that are generally tolerated less well after bariatric surgery include red meats, chicken, breads, and high-fibre fruits and vegetables. It is also advised to avoid rice, raw vegetables, fresh fruits, and tough meats like pork and steak. Patients should consult with a dietitian to discuss their specific needs, as some may require additional supplements, such as folic acid or iron.
Adhering to the recommended dietary guidelines is essential for the success of the surgery and the patient's overall health. Bariatric surgery patients must commit to a lifestyle change, adopting new eating habits and portion control. While the immediate post-surgery diet is highly restrictive and requires medical supervision, the long-term diet aligns with healthy eating guidelines and can be safely followed with adjustments to meet individual calorie needs. Seeking professional guidance from weight loss coaches or healthcare providers is advisable to ensure a safe and effective transition to this new way of eating.
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Frequently asked questions
The short answer is no. The diets that are prescribed immediately before and after bariatric surgery are very restrictive and should only be followed under medical supervision. However, there is also a long-term diet that patients follow after they have recovered from surgery, which aligns with healthy eating guidelines and should be safe for most people.
This diet is designed to help the stomach recover after surgery. It starts as a liquid diet and involves gradually moving to solid food over a few weeks. It should not be followed without medical approval.
Once patients have recovered from surgery, they follow a balanced diet based on planning meals with key food groups. People on this diet usually aim to eat between 900 and 1,000 calories per day. It should be safe to follow an adjusted version of this diet, but it's best to speak to a doctor first.
Yes. Restrictive diets are not the safest or most effective ways to lose weight. If you want to lose weight without surgery, you can try a calorie-controlled diet and exercise plan, or seek help from a professional weight-loss coach.











































