When your appetite is suppressed by a GLP-1 medication, you are not going to be sitting down to large, balanced meals three times a day. For most patients, food becomes something you eat in smaller amounts, less frequently, and with less enthusiasm than before.
That is exactly why choosing the right foods becomes so important. When every meal is smaller, the nutritional quality of what you eat has to go up. And the nutrient that matters most is protein. If you want to understand exactly why, and what the warning signs of low protein look like on a GLP-1 medication, start with our first post in this series.
At Washington Trim Clinic, we work with patients on semaglutide and tirzepatide every day. Here is the guide we wish every patient had before starting their first month.
Why Protein Comes Before Everything Else
Your goal on a GLP-1 medication is to lose fat while protecting muscle. Muscle keeps your metabolism running, prevents weight regain after you stop the medication, and keeps you strong and energetic throughout your weight loss journey. Most patients should aim for 80 to 100 grams of protein per day at minimum, and every meal should lead with protein.
The Best Protein Sources for Omnivores
- Chicken breast (3 oz cooked): about 26 grams of protein, roughly 140 calories. Mild, versatile, works hot or cold.
- Turkey breast: nearly identical to chicken, slightly easier to digest for some patients.
- Canned tuna: 22 grams of protein for around 100 calories per 3 oz. No cooking required.
- Salmon: 21 grams per 3-ounce serving plus omega-3 fatty acids that support inflammation and heart health.
- Shrimp: about 85 calories for 20 grams of protein. Easy to keep in the freezer and quick to prepare.
- Greek yogurt: smooth, easy to eat, no preparation needed. A 3/4 cup serving gives you around 17 grams of protein.
- Cottage cheese: 14 grams per half cup, mild in flavor, easy on the stomach.
- Whole eggs: 12 grams of complete protein for 2 large eggs, along with healthy fats and key vitamins.
The Best Protein Sources for Vegetarians
- Eggs: two large eggs provide 12 grams of complete protein and are easy to eat even on low-appetite days.
- Greek yogurt and skyr: around 17 grams of protein per serving. Soft, easy to eat, can be paired with berries or nutritional yeast.
- Paneer: 14 grams per half cup, works well in cooked dishes with spinach or lentils.
- Tempeh: fermented soy providing 15 grams per half cup. Gentler on digestion than many plant proteins.
- Edamame: a complete plant protein. Half a cup shelled gives you 11 grams and is easy to eat as a snack.
- Lentils: 18 grams per cup cooked, also high in fiber which helps with constipation some GLP-1 patients experience.
The Best Protein Sources for Vegans
- Seitan: the highest-protein plant food available, about 21 grams per 3-ounce serving with a firm, meaty texture.
- Tempeh: 15 grams per half cup, fermented for easier digestion, best all-around vegan protein for GLP-1 patients.
- Firm tofu: 10 grams per half cup, absorbs the flavor of whatever you cook it with.
- Nutritional yeast: 12 grams per 3 tablespoons, mild cheesy flavor, easy to stir into sauces or soups.
- Hemp seeds: 10 grams per 3 tablespoons, sprinkle on virtually anything with almost no change to flavor.
- Chickpeas, black beans, and split peas: 15 to 18 grams per cup cooked, also excellent fiber sources.
Protein Supplements: When to Use Them
On days when your appetite is very low, a protein shake or smoothie can be a valuable tool. Look for options with at least 20 to 25 grams of protein per serving and under 5 grams of sugar. For omnivores and vegetarians, whey protein isolate is the most well-absorbed option. For vegans, pea protein or a pea and rice protein blend works well and is gentle on digestion. Supplements work best as a bridge on difficult days, not as a daily replacement for food. To see how these foods come together across a real day of eating, read our sample meal plan guide for GLP-1 patients.
Timing Your Protein Around Exercise
If you are incorporating resistance training into your routine, and we strongly encourage it for muscle protection, protein timing matters more than most people realize. Try to eat 20 to 30 grams of protein within an hour after your workout. This is the window when your muscles are most ready to absorb protein for repair and growth.
Greek yogurt, a protein shake, cottage cheese, tofu, or a small portion of chicken or fish all work well as a post-workout option and are easy to eat even when your appetite is still suppressed. Resistance training two to three times per week alongside consistent protein intake is the most effective combination for protecting muscle on a GLP-1 medication. Short sessions with bodyweight exercises or resistance bands are enough to send your body the signal to hold onto muscle rather than break it down.
GLP-1 Nutrition Series
→ Part 1: Why Protein Is the Most Important Nutrient on a GLP-1 Medication
→ Part 2: The Best High-Protein Foods to Eat on GLP-1 Medications (you are here)
→ Part 3: What a Full Day of Eating Looks Like on a GLP-1 Medication
We Help You Build a Plan That Works for You
At Washington Trim Clinic, every patient on our medical weight loss program receives guidance on nutrition alongside their medication. We use Styku 3D body composition scanning to track fat versus muscle each month so we can catch protein deficiency early and adjust before it becomes a problem.
Our semaglutide program starts at $299 per month and tirzepatide starts at $399 per month. Month to month, no contracts.
Call (425) 552-3755 or visit us at 13401 Bel-Red Rd, Suite A3, Bellevue, WA 98005.
