Additional GLP-1 + Obesity/Weight Management Resources
This training also includes the recording of the February 2026 CEU Webinar: Nutritional Priorities in GLP-1 Therapy. After watching the recording, reviewing the attached slide deck, and passing the Knowledge Check, you will earn 1 CEU credit, to be downloaded directly from the training module.
Includes access to additional resources, current research, a medication library, a Facebook community, and more!
Introduction to GLP-1 Treatment
While GLP-1 receptor agonists have revolutionized obesity treatment by offering significant weight reduction, their use without structured nutritional and lifestyle support creates a critical "implementation gap". Relying solely on medication can lead to severe gastrointestinal distress, loss of vital muscle mass, nutritional deficiencies, and rapid weight regain if the medication is discontinued. This article outlines the necessary nutritional protocols, patient assessment strategies, and implementation supports—such as Medical Nutrition Therapy (MNT) and Food is Medicine (FIM)—to ensure safe, long-term success for members on GLP-1 therapy.
Common Medications and Mechanisms
GLP-1 medications work by mimicking natural incretin hormones to increase satiety (fullness) and slow gastric emptying. Tirzepatide, a dual-agonist, also targets the GIP receptor to regulate fat metabolism and potentially reduce nausea. Common medications by active ingredient include:
Semaglutide: Ozempic, Wegovy, and Rybelsus.
Liraglutide: Victoza and Saxenda.
Dulaglutide: Trulicity.
Exenatide: Byetta and Bydureon.
Lixisenatide: Adlyxin.
Tirzepatide: Mounjaro and Zepbound.
Key Risks and Side Effects
Medication-only approaches carry significant risks, contributing to high discontinuation rates (50–67% at one year).
Gastrointestinal (GI) Distress: Nausea (up to 44%), diarrhea (30%), vomiting (24%), constipation (24%), and reflux are the primary drivers of discontinuation.
Nutritional Deficiencies: Caloric intake often drops by 16% to 39%, leading to deficiencies in protein, iron, calcium, magnesium, and essential vitamins (B1, B12, D, and C).
Muscle and Bone Loss: Without structured intervention, 20% to 40% of the weight lost can be lean body mass.
Severe/Rare Risks: These include pancreatitis, gallbladder disease, acute kidney injury (often secondary to dehydration), and mental health changes like new or worsening depression.
Nutritional Priorities: The "Protein-First" Strategy
Because GLP-1s suppress appetite, transitioning members from simply "eating less" to "eating with intention" is crucial.
Daily Target: Aim for 1.2 to 1.5 grams of protein per kilogram of goal body weight to prevent sarcopenia (muscle wasting).
Per-Meal Target: Members should consume a minimum of 25–30 grams of protein per meal to trigger muscle protein synthesis. Members should eat protein-rich foods first at every meal.
Healthy Fats: Fats provide dense energy and essential fat-soluble vitamins (A, D, E, K) without requiring large volumes of food. Prioritize unsaturated fats like avocados, nuts, and olive oil, but monitor for tolerance as large amounts of fat can worsen delayed gastric emptying.
Managing Gastrointestinal Side Effects
Registered Dietitians should tailor food quality targets to mitigate symptoms:
For Nausea: Encourage small, frequent meals (every 3–4 hours), avoid high-fat/fried foods, and incorporate ginger or peppermint tea. Soft textures like tofu, edamame, and Greek yogurt are gentle on a nauseous stomach.
For Constipation: Gradually increase fiber intake (aiming for 25–30g daily) and ensure aggressive hydration. Magnesium supplementation can also be considered.
Physical Activity for Muscle Preservation
GLP-1 therapy is a partner to exercise, not a substitute. It must be combined with a structured exercise program to protect lean mass and bone density.
Strength Training: Essential at least 3 times per week to signal the body to keep muscle while burning fat.
Aerobic Activity: At least 150 minutes of moderate-intensity exercise weekly.
Total Goal: Aim for 360 minutes per week of mixed training (resistance + aerobic) to preserve lean mass.
Implementation Strategies for Success
To support long-term adherence and health equity, clinicians should utilize comprehensive support systems:
Medical Nutrition Therapy (MNT): Direct referral to a Registered Dietitian significantly improves weight maintenance, dietary quality, and glycemic control. Dietitians play a critical role in facilitating behavior change, supporting medication adherence, and managing GI side effects.
Food is Medicine (FIM): For members facing nutrition insecurity, providing produce boxes or medically tailored groceries bridges the gap between medication access and nutritional health. Dietitians can engage members through a "box reveal" to discuss the macro- and micro-nutrient profiles of the provided food.