Protein guide for Ozempic, Wegovy, Zepbound, and Mounjaro users
"To maintain physical function, older adults need more dietary protein than do younger adults; older people should consume an average daily intake at least in the range of 1.0 to 1.2 g protein per kilogram of body weight per day. Even higher protein intake (ie, ≥ 1.2 g/kg body weight/d) is advised for those who are exercising and otherwise active."
— Bauer et al. (PROT-AGE Study Group), JAMDA (2013)
GLP-1 medications work — but the body-composition data is sobering. The SURMOUNT-1 trial lean-mass analysis (Aronne et al. 2024) found that 25–40% of the weight you lose on a GLP-1 can be lean muscle without targeted intervention. The earlier STEP-1 trial of semaglutide reported the same range.
Two things move that number: hitting a high enough protein target every day, and resistance training. This guide is about the first one — because if your appetite is suppressed to 1,200–1,500 kcal a day, you can't just "eat more protein." You have to choose denser foods, where a larger share of every calorie is protein.
That's the framework we use across this site. Every food is scored by the % of its calories that come from protein, and binned into 4 tiers (Platinum, Gold, Silver, Avoid). On a GLP-1, you need to average Gold or Platinum across the day to comfortably hit your target. The sub-pages below break that down by use case.
Get your daily protein target and the food density you need to hit it inside your reduced appetite.
Explore the guide
Five focused resources for everyday decisions on a GLP-1.
Curated Platinum-tier snacks that deliver real protein in the calories you can actually eat.
Print-friendly, density-ranked grocery list with serving sizes and tier badges.
Structured high-protein menu averaging Gold or Platinum tier across every meal.
What to prioritize, what to avoid, and how to manage nausea while still hitting your protein.
What to order at sushi, Indian, Mexican, Chinese, Thai and Italian restaurants when appetite is suppressed and protein is non-negotiable.
Why this matters
Lean mass — your muscle, organs, and the metabolically active tissue that drives your resting energy expenditure — is hard to build and easy to lose under a calorie deficit. Heymsfield et al. (Obesity, 2024) tracked body composition through GLP-1 therapy and confirmed what the SURMOUNT-1 and STEP-1 trials hinted at: meaningful lean-mass loss is the default unless you intervene. That loss isn't cosmetic. It compromises strength, metabolic rate, and the durability of weight loss after you stop the medication.
The strongest lever you control daily is protein intake. The International Society of Sports Nutrition's 2017 position stand on protein recommends 1.6–2.4 g/kg of bodyweight for individuals aiming to preserve lean mass under an energy deficit. We use 2.0 g/kg of goal weight as the practical midpoint — high enough to be protective, low enough to be hittable when appetite is suppressed.
Hitting that target inside a 1,200–1,500 kcal day means roughly 30–40% of your calories need to come from protein. That's the entire reason Protein Density matters more on a GLP-1 than off one: low-density "high protein" snacks (under 25% of calories from protein) crowd out the room you have for the foods that actually move the needle.
It also isn't just about total grams. The amino acid leucine is the trigger for muscle protein synthesis, and each meal needs to clear a threshold to fully fire it — which is harder, and more important, when appetite is suppressed. See why leucine is the protein metric that actually matters for the full picture.
Frequently asked questions
Plain-language answers to the most-searched GLP-1 protein questions.
What should I eat on Ozempic?
Prioritize high-protein, nutrient-dense foods that go down easy when appetite is suppressed: Greek yogurt, cottage cheese, eggs and egg whites, whey isolate shakes, lean chicken or turkey, fish, tofu, and Fairlife Core Power. These are all Platinum-tier (40%+ of calories from protein), so you hit your protein target inside a smaller calorie budget. See our /glp-1/what-to-eat guide for the full prioritize/avoid list.
How much protein should I eat on Wegovy?
Current sports-nutrition consensus is 1.6–2.4 g/kg of GOAL bodyweight per day (International Society of Sports Nutrition position stand, 2017). For someone targeting 75 kg (165 lb), that's 120–180 g of protein daily, biased toward the upper end if you're actively losing weight or are 50+. Our calculator does the math for your specific situation.
Will I lose muscle on a GLP-1?
Without intervention, yes — meaningfully. The SURMOUNT-1 trial body-composition analysis (Aronne et al. 2024) and prior STEP-1 data found that 25–40% of weight lost on GLP-1 medications can be lean mass. Hitting a high protein target and resistance training are the two evidence-backed interventions to limit that loss.
Are protein bars OK on Ozempic?
Most popular protein bars (Quest, Built, Barebells) sit in the Gold tier (25–40% of calories from protein) and absolutely count toward your goal. They may not be enough on their own if your appetite is very low — on those days, lean on Platinum-tier sources like whey isolate, egg whites, or Fairlife Core Power to hit your target.
Why goal weight, not current weight, for setting protein?
Targeting protein based on current (heavier) weight typically over-estimates needs and crowds out other nutrients in a calorie-restricted diet. Goal weight is the convention used in current GLP-1 nutrition consensus and is what the calculator uses by default.
How do I avoid nausea while eating more protein?
Eat smaller amounts more often (every 2–3 hours), use cold or room-temperature foods (smoothies, Greek yogurt, cottage cheese), and avoid greasy or very fatty preparations on injection days. Whey isolate shakes are usually the easiest tolerated source when nausea is high. Talk to your prescribing doctor if symptoms are severe.
What is "protein density" and why does it matter on a GLP-1?
Protein density is the percentage of a food's calories that come from protein. We score every food on a 4-tier system: Platinum (40%+), Gold (25–39%), Silver (15–24%), Avoid (under 15%). On a GLP-1, if your appetite is suppressed below 1,500 kcal/day, you typically need to average Gold or Platinum tier to hit your protein goal in the calories you can comfortably eat.
Disclaimer
Educational only — not medical advice. Talk to your prescribing doctor before changing your diet, supplement routine, or medication dose. Sources for the numbers on this page are listed on our methodology page.