Willow doesn’t prescribe a specific meal plan or calorie target. What you eat on the program is your choice, but some food choices work with your GLP-1 medication, and others can make side effects harder to manage.
Why food choices matter on GLP-1 medication
GLP-1 medications slow gastric emptying, meaning food moves through your stomach more slowly than usual. This is part of how the medication reduces appetite, but it also means your digestive system is more sensitive, particularly in the first few weeks of treatment.
Certain foods are harder to digest and can worsen common side effects like nausea, bloating, and indigestion. Choosing foods that are gentler on your system can make the first weeks of treatment significantly more comfortable.
Foods that may worsen side effects
There are no strict rules, but the following categories tend to worsen nausea, bloating, and GI discomfort, especially during early treatment. Limiting them can make a real difference in how you feel day to day.
High-fat and greasy foods. Fried foods, fatty cuts of meat, full-fat dairy, and heavy sauces are harder to digest and can intensify nausea. Smaller portions of healthy fats (like avocado or olive oil) are generally better tolerated.
Sugary and ultra-processed foods. Candy, pastries, sodas, and packaged snacks can worsen GI discomfort and may counteract the appetite regulation the medication provides.
Large or very heavy meals. Because gastric emptying is slower, large meals can sit uncomfortably and cause nausea or bloating. Smaller, more frequent meals are often much easier to manage on GLP-1 medication.
Alcohol. Alcohol may increase the risk of nausea and blood sugar fluctuations while on GLP-1 medication. If you do drink, smaller amounts, not on an empty stomach, tend to be better tolerated.
Foods and habits that support your treatment
Many patients find these approaches helpful for feeling better and getting more out of their treatment.
Lean protein at each meal. Chicken, fish, eggs, tofu, and legumes are gentler on the digestive system than fatty meats and help preserve muscle during weight loss. Protein also helps you feel satisfied on smaller portions.
Fiber-rich carbohydrates. Oats, quinoa, sweet potatoes, and non-starchy vegetables like broccoli, peppers, and leafy greens are slower to digest and easier on your system than white bread, white rice, or processed cereals.
Plenty of water. Staying hydrated throughout the day can ease nausea, reduce headaches, and support digestion, all of which are common concerns in early treatment.
Smaller, more frequent meals. Eating smaller portions more often, rather than two or three large meals, tends to be more comfortable when your digestion is slower. Eating slowly and stopping when you feel full (not stuffed) also helps.
A short walk after meals. Light movement after eating can ease bloating and support digestion. It doesn’t need to be strenuous; even 10–15 minutes can help.
Supporting muscle preservation
Weight loss on GLP-1 treatment can sometimes include loss of lean muscle mass alongside fat. A few habits can help protect your muscles while your body adjusts:
Prioritize protein. Adequate protein intake is one of the most important things you can do to preserve muscle during weight loss. Your Willow doctor can help you understand what’s appropriate for your specific situation.
Stay active. Resistance or weight-bearing exercise a few times a week can help maintain strength. You don’t need to go to a gym; bodyweight exercises at home count.
Don’t under-eat. Reduced appetite is expected on GLP-1 medication, but eating too little can contribute to fatigue and muscle loss. If you’re unsure whether you’re eating enough, message your doctor.
If you take oral semaglutide tablets: These must be taken on an empty stomach with a small sip of water, at least 30 minutes before eating or drinking anything else. This is different from the injectable form, which can be taken with or without food. Always follow the instructions provided by your Willow doctor.
When to talk to your doctor
If you’re experiencing persistent nausea, vomiting, or GI symptoms that aren’t improving, message your Willow doctor through the patient portal. A dose adjustment or more personalized nutrition guidance may help. Your doctor is the right first step, not a forum or a general internet search.
How to reach your doctor: Open your patient portal and navigate to the Messages section. Your Willow doctor reviews messages daily and responds within 24 hours.
Email us at: [email protected] if you have any questions!