According to Gram Research analysis of a 2026 consensus statement from major European health organizations, GLP-1 weight-loss medications like Ozempic and Wegovy produce significant weight loss and heart health improvements, but require careful monitoring of protein intake, exercise, nutrient levels, and mental health to prevent muscle loss, vitamin deficiencies, and psychological challenges. The statement recommends eating adequate protein, doing regular weight training, getting regular nutrient blood tests, and working with doctors to decide whether to continue these medications based on individual benefits and risks.
A major medical consensus statement from leading European health organizations provides practical guidance for people taking new weight-loss medications called GLP-1 drugs (like Ozempic and Wegovy). While these medications help people lose weight and improve heart health, they can also reduce appetite, cause stomach problems, and affect how people feel about food and eating. The new guidelines recommend monitoring protein intake, exercising regularly, checking nutrient levels, and getting psychological support to help people stay healthy and maintain muscle while losing weight. The statement emphasizes working closely with doctors to make personalized decisions about starting or continuing these medications.
Key Statistics
A 2026 consensus statement from three major European health organizations recommends that adults taking GLP-1 weight-loss medications consume 1.2 to 2.0 grams of protein per kilogram of body weight daily and perform resistance exercise 2-3 times weekly to preserve muscle mass during weight loss.
The 2026 EASO-EFAD-ECPO consensus statement identifies gastrointestinal side effects, reduced appetite, rapid weight loss, and changes in food reward as potential nutritional, functional, and psychological risks requiring monitoring and support in people using GLP-1 receptor agonist medications.
According to the 2026 European consensus statement on GLP-1 medications, regular monitoring should include diet quality assessment, micronutrient status testing, physical function evaluation, and psychological screening to ensure safe and effective weight loss treatment.
The Quick Take
- What they studied: How to safely use new weight-loss medications while protecting overall health, nutrition, muscle, and mental wellbeing
- Who participated: This is a consensus statement—expert doctors from three major European obesity and nutrition organizations reviewed existing research to create practical recommendations for adults using GLP-1 medications
- Key finding: GLP-1 medications work well for weight loss and heart health, but people need careful monitoring of protein intake, exercise, nutrient levels, and mental health to avoid problems like muscle loss, nutritional deficiencies, and eating-related psychological challenges
- What it means for you: If you’re considering or taking these medications, work with your doctor to ensure you’re eating enough protein, exercising with weights, getting regular nutrient checks, and getting mental health support if needed. These steps can help you lose weight safely while keeping your muscles strong and your mind healthy.
The Research Details
This is a consensus statement, which means leading experts from three major European organizations (EASO, EFAD, and ECPO) reviewed all available scientific research on GLP-1 medications and created practical recommendations based on the best evidence. Rather than conducting a new study, the experts synthesized what we already know about these medications and identified gaps in our knowledge.
The statement covers four main areas: nutrition and diet during weight loss, maintaining muscle and physical fitness, psychological and mental health impacts, and how to monitor people’s health while they’re taking these medications. The experts also discussed fairness in access to these medications and the importance of shared decision-making between doctors and patients.
This type of expert consensus is valuable because it brings together knowledge from multiple countries and specialties—including obesity medicine, nutrition, and psychology—to create practical guidance that doctors and patients can actually use in real life.
These medications are new and very popular, but we’re still learning about the best ways to use them safely. A consensus statement helps doctors and patients understand not just whether these drugs work, but how to use them in ways that protect overall health. This is especially important because rapid weight loss can sometimes cause problems like muscle loss, vitamin deficiencies, and psychological challenges that people might not expect.
This statement comes from three respected European medical organizations and represents the combined expertise of many specialists. However, because it’s based on reviewing existing research rather than conducting new studies, the strength of recommendations varies depending on how much evidence exists for each topic. The authors clearly identify areas where more research is needed, which shows scientific honesty. The statement was published in The Lancet Diabetes & Endocrinology, a highly respected medical journal.
What the Results Show
GLP-1 medications (including drugs like semaglutide and tirzepatide) produce significant weight loss and improve heart health markers in most people. However, these benefits come with potential risks that need careful management. The medications work partly by reducing hunger and changing how food tastes and feels rewarding, which can be helpful for weight loss but may create nutritional or psychological challenges for some people.
The consensus statement identifies several key areas requiring attention: First, protein intake becomes critically important during weight loss because the body can lose muscle along with fat. The experts recommend eating adequate protein (roughly 1.2 to 2.0 grams per kilogram of body weight daily) and doing resistance exercise (like weight training) to preserve muscle mass. Second, gastrointestinal side effects like nausea, vomiting, and constipation are common and need practical strategies to manage them. Third, the medications can cause rapid changes in how people relate to food, eating, and their bodies, which may trigger or worsen eating disorders or other psychological issues in vulnerable people.
The statement emphasizes that people taking these medications need regular monitoring of their diet quality, micronutrient status (vitamins and minerals), physical function, and mental health. Doctors should screen for psychological risks before starting treatment and provide ongoing support. The experts also stress the importance of shared decision-making—doctors and patients should discuss together whether to start, continue, adjust, or stop these medications based on individual benefits and risks.
The statement highlights several important secondary findings: Quality of life and physical function often improve during weight loss with these medications, but this isn’t guaranteed for everyone. Some people experience positive psychological changes, while others struggle with identity shifts and changes in social eating. The medications may help with obesity-related health problems beyond weight loss, such as joint pain and sleep apnea, but more research is needed. Access to these medications varies greatly by country and insurance coverage, creating fairness concerns. The statement notes that we need more research on what happens after people stop taking these medications—do they maintain weight loss, and what support helps them stay healthy?
These medications represent a major advance compared to older weight-loss drugs and lifestyle-only approaches, producing larger weight losses and more consistent cardiometabolic benefits. However, previous weight-loss treatments didn’t require as much attention to protein intake and muscle preservation, partly because they were less effective at producing rapid weight loss. The psychological considerations highlighted in this statement are relatively new—earlier weight-loss approaches didn’t change food reward and eating behavior as dramatically. This consensus statement builds on growing research showing that newer medications require a more comprehensive, multidisciplinary approach than older treatments.
This is a consensus statement based on existing research, not a new study, so the strength of evidence varies by topic. Some recommendations are based on strong research, while others reflect expert opinion because research is limited. The statement was created by European experts, so recommendations may not apply equally to all populations or healthcare systems. The medications are relatively new (approved in recent years), so long-term data on outcomes like micronutrient status and muscle health over many years is still limited. The statement identifies numerous areas needing future research, indicating gaps in current knowledge.
The Bottom Line
If you’re taking or considering GLP-1 medications: (1) Eat adequate protein at each meal and consider protein supplements if needed (strong evidence); (2) Do resistance exercise 2-3 times weekly to preserve muscle (strong evidence); (3) Get regular blood tests to check nutrient levels, especially B12, iron, and calcium (moderate evidence); (4) Monitor diet quality and work with a dietitian (moderate evidence); (5) Screen for eating disorders or psychological concerns before starting and get support if needed (moderate evidence); (6) Have regular check-ins with your doctor about whether to continue the medication (strong evidence). Work with your healthcare team to personalize these recommendations based on your individual situation.
These recommendations apply to adults considering or taking GLP-1 medications for weight loss. They’re especially important for people at risk of muscle loss (older adults, sedentary people), those with a history of eating disorders, people with nutrient deficiencies, and those experiencing gastrointestinal side effects. People with certain medical conditions or taking other medications should discuss these recommendations with their doctor. These guidelines may not apply to people taking GLP-1 medications for diabetes management (a different use), though some principles overlap.
Benefits like weight loss appear within weeks, but nutritional and physical changes develop over months. Muscle preservation requires consistent protein intake and exercise from the start—waiting to begin resistance training can result in permanent muscle loss. Nutrient deficiencies may develop gradually over months to years, making regular monitoring important. Psychological adjustments to changes in food reward and eating behavior may take several months. Most people see stabilization of weight loss within 6-12 months, at which point maintenance strategies become important.
Frequently Asked Questions
Do I need to take vitamins if I’m on GLP-1 weight-loss medication?
Possibly. Rapid weight loss and reduced food intake can lower vitamin and mineral levels, especially B12, iron, and calcium. A 2026 expert consensus recommends regular blood tests to check nutrient status and supplementation if deficiencies develop. Discuss specific supplementation with your doctor based on your test results.
Will I lose muscle on GLP-1 medications like Ozempic?
You may lose some muscle along with fat during rapid weight loss, but this is preventable. A 2026 consensus statement recommends eating adequate protein (1.2-2.0 grams per kilogram of body weight daily) and doing resistance exercise 2-3 times weekly to preserve muscle mass while taking these medications.
What should I do about stomach problems from GLP-1 medications?
Nausea, vomiting, and constipation are common. A 2026 expert consensus recommends eating smaller, frequent meals; staying hydrated; eating slowly; avoiding high-fat foods; and increasing fiber gradually. If side effects are severe or persistent, discuss with your doctor about adjusting your dose or timing of meals.
Can GLP-1 medications trigger eating disorders?
These medications change how food tastes and feels rewarding, which may trigger or worsen eating disorders in vulnerable people. A 2026 consensus statement recommends psychological screening before starting treatment and ongoing mental health support, especially for people with a history of disordered eating.
How long should I stay on GLP-1 weight-loss medication?
This is an individual decision made with your doctor. A 2026 expert consensus emphasizes shared decision-making—discussing whether benefits (weight loss, heart health) outweigh risks (side effects, cost, nutrient concerns) for your specific situation. Regular check-ins help determine if continuing, adjusting, or stopping is best.
Want to Apply This Research?
- Track daily protein intake (grams) and weekly resistance exercise sessions (minutes). Set a goal of 1.2-2.0 grams of protein per kilogram of body weight daily and 2-3 resistance training sessions per week. Log any gastrointestinal symptoms and their timing relative to meals to identify triggers.
- Use the app to plan high-protein meals and snacks before hunger decreases further. Set reminders for resistance exercise sessions and log completed workouts. Track which foods cause stomach problems and which are well-tolerated. Create a checklist for upcoming doctor visits to discuss medication continuation and nutrient testing.
- Monthly: review protein intake adequacy and exercise consistency. Quarterly: track changes in energy, physical function, and mood. Biannually: prepare for nutrient blood tests by noting any symptoms of deficiency (fatigue, weakness, hair loss). Annually: assess overall satisfaction with the medication and whether benefits outweigh side effects.
This article summarizes expert consensus recommendations for using GLP-1 medications safely. It is not medical advice. GLP-1 medications are prescription drugs that require doctor supervision. Do not start, stop, or change any medication without consulting your healthcare provider. Individual needs vary based on medical history, other medications, and health conditions. This statement applies to adults using these medications for weight loss; different considerations may apply for diabetes treatment. If you experience severe side effects, psychological distress, or signs of nutrient deficiency, contact your doctor immediately.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.