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GLP-1 Calculators

Protein Target on GLP-1 in 2026 — The Muscle-Preservation Number That Matters

Calculate your daily protein grams (1.2–1.6 g/kg of goal weight), split across 3–4 meals, with a food-source cheat sheet tuned for GLP-1 appetite suppression.

Updated April 2026

Medical disclaimer: This tool is for informational purposes. Not medical advice. Consult your healthcare provider before starting, stopping, or changing any medication. Drug prices, savings cards, and coverage policies change frequently — verify current pricing directly with the manufacturer or your pharmacy.

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Results

Daily protein target
123g
Lean mass: 136 lb
Per meal (3)
41g
Per meal (4)
31g
Roughly 25–30% of weight lost on GLP-1s is lean mass unless you hit a high protein target. Aim for 2.0g per kg of lean body mass, split across 3–4 meals.

Why protein is the #1 lever for muscle preservation

Weight loss of any kind — diet, exercise, GLP-1, surgery — drives some lean mass loss alongside fat loss. The ratio of fat to lean is mostly controlled by two factors: protein intake and resistance training. On GLP-1s specifically, appetite suppression makes protein shortfall the default mode for most patients, which is why deliberate planning matters.

1.2–1.6 g/kg goal weight is the consensus across the American Society for Nutrition and the International Society of Sports Nutrition for adults in calorie deficit. Above 1.6 g/kg offers diminishing returns for most; below 1.0 g/kg raises lean-mass loss materially.

Protein-rich foods ranked for GLP-1 patients

  • Greek yogurt (plain, nonfat): 17–22 g per cup. Easy on suppressed appetite.
  • Cottage cheese: 25 g per cup. Can layer with fruit for satiety.
  • Whey protein shake: 25–30 g per scoop. Liquid is easier than solid when full.
  • Egg whites + whole eggs: 14–20 g per typical breakfast.
  • Chicken breast: 26–30 g per 4 oz. Lean, affordable.
  • Fish (salmon, tuna, cod): 22–26 g per 4 oz. Plus omega-3s.
  • Lean beef: 25–28 g per 4 oz. Iron and B12 dense.
  • Tofu / tempeh: 10–21 g per 4 oz. Plant-based mainstay.
  • Cottage cheese bowls, overnight oats with protein powder: Easy batch-prep options.

A typical high-protein day on GLP-1

  • Breakfast (30 g): Greek yogurt bowl with 1 scoop protein powder and berries.
  • Lunch (35 g): Salad with 5 oz grilled chicken, chickpeas, olive oil.
  • Afternoon snack (15 g): Cottage cheese with fruit or a protein bar.
  • Dinner (30 g): 5 oz salmon, roasted vegetables, small serving grains.
  • Total: ~110 g, hitting a 180-lb goal at 1.3 g/kg.

What to do when you can’t hit target

Some GLP-1 days you genuinely can’t eat another bite. On those days: a protein shake in water delivers 25+ g with minimal appetite load. Skipping the shake and hitting 60 g instead of 110 g for one day won’t ruin the week. Chronic shortfall (3+ days/week of sub-80 g) is the real risk — that’s when lean-mass loss accelerates.

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Resistance training dose.
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Calorie targets and food choices.
Goal weight timeline
Weeks to target by drug.

Frequently asked questions

What's the right protein target on a GLP-1?

1.2–1.6 g per kg of GOAL body weight (not current weight) is the obesity-medicine consensus. For a 180-lb (82 kg) goal, that's 98–131 g protein daily. Goal weight is used rather than current to avoid over-feeding protein relative to the body you're trying to build. Upper end (1.6 g/kg) is for patients with higher resistance-training volume or patients 60+ with sarcopenia risk.

Why not use current weight?

Using current weight while obese over-estimates the protein target because adipose tissue doesn't have protein requirements. Scaling to goal weight (or ideal body weight) gives the right metabolic target and avoids the distortion. Some protocols use lean body mass instead — even more accurate if you have a DEXA.

How should I split it across meals?

3–4 meals, each 25–40 g protein. The 25 g floor is the threshold for maximal muscle protein synthesis per meal in most adults under 50; over 50, push closer to 35–40 g per meal. Missing the threshold at one meal isn't disastrous if you hit the daily total — but daily total is easier to hit when each meal is protein-anchored.

Is that much protein even possible when appetite is suppressed?

It requires planning. GLP-1 appetite suppression makes high-protein hitting harder — you have less appetite capacity and tend to eat less calorie-dense foods. Solutions: protein-first meals (eat protein before carbs/fats), protein shakes in water or milk (25–30 g per scoop, easy to consume), Greek yogurt (15–20 g per cup), cottage cheese (25 g per cup), and protein bars (10–20 g) as between-meal supplements.

Does protein type matter?

Animal proteins (meat, dairy, egg, fish) have the most complete amino acid profiles and the highest leucine content — leucine is the primary trigger for muscle protein synthesis. Plant-based eaters can hit the same target but may need 10–20% more total grams to match the amino acid profile, and should combine sources (legumes + grains, soy + nuts, etc.).

Any evidence for whey or casein specifically?

Whey protein isolate is well-absorbed and high in leucine — good for post-workout. Casein is slow-digesting — good before bed for overnight muscle protein synthesis. Both are safe and well-studied in weight-loss contexts. No special GLP-1 interaction.

What about protein and kidney function?

In healthy kidneys, higher protein intake (up to 2 g/kg) does not damage kidney function. In existing kidney disease, protein targets should be individualized with a nephrologist. Most GLP-1 patients do not need to worry about kidney-driven protein limits.

Does protein timing matter for weight loss specifically?

Front-loading protein at breakfast (30+ g within an hour of waking) has evidence for appetite suppression across the day and for lean-mass preservation. This is a small lever vs total daily protein, but it's free and easy to implement.

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