How to Eat 100 Grams of Protein a Day on a GLP-1

Your doctor said hit 100 grams of protein. Your appetite said absolutely not. If you've searched for advice online, you've seen the common complaint: “How the hell are you eating 100 grams of protein?”

Why 100 grams and why it is non-negotiable on a GLP-1

To preserve lean muscle during weight loss, research supports consuming 1.2 to 2.0 grams of protein per kilogram of body weight daily (Jäger et al., JISSN, 2017). That means your target depends on your body weight:

Source: protein range of 1.2 to 2.0 g/kg per Jäger et al., JISSN, 2017. Find your exact number with the calculator in our GLP-1 nutrition guide.

For most adults, 100 grams is a practical floor, not a ceiling. If you weigh over 185 pounds, 100 grams may already be undershooting the 1.2 g/kg minimum.

This floor matters more on a GLP-1 because the medication cuts how much you eat: once-weekly semaglutide lowered daily energy intake by roughly a quarter compared with placebo (Blundell et al., Diabetes, Obesity and Metabolism, 2017). When total intake drops that much without getting enough protein, a disproportionate share of the weight you lose comes from lean mass (muscle, water, and other non-fat tissue), which, according to research, can be more than a third of total weight lost (Wilding et al., J Endocr Soc, 2021; ClinicalTrials.gov, NCT03548935). Adequate protein shifts that ratio back toward fat loss. As Salas-Whalen puts it, “If skeletal muscle is the engine that powers your body’s metabolism, protein is the fuel.” (More in GLP-1 and Muscle Loss.)

Why most protein guides don’t work on a GLP-1

Most guides on this topic are written for people with a normal appetite. They hand you a food list, tell you to eat more chicken, and call it done. On a GLP-1, you are working with maybe half your usual appetite, sometimes even less. A food list doesn’t help if you can’t finish three bites.

The question isn’t “which foods have protein?” It’s “which foods give me the most protein in the fewest bites?” That reframe changes everything.

What 100 grams of protein looks like, ranked by density

When your stomach has room for only a few bites, the ranking that matters more than protein per serving is protein per calorie. Getting the most protein for the fewest bites matters twice as much on a GLP-1 because your appetite may be half what it used to be.

The table below ranks common sources by grams of protein per 100 calories. Foods at the top deliver the most protein for the least stomach space; foods near the bottom are healthy but less efficient when every bite counts.

Source: USDA FoodData Central. Values are approximate and vary by cut and preparation.

How much protein per meal, and how to spread it across the day

To hit 100 grams on a small appetite is to stop thinking about a daily total and start thinking about anchors. Eating 25 to 30 grams of protein at each of several meals might stimulate more 24-hour muscle protein synthesis than the same amount eaten unevenly (Mamerow et al., Journal of Nutrition, 2014), and Salas-Whalen turns that into a simple rule:

Two habits make this work on a GLP-1. One is protein first: eat it before anything else on the plate, because you may fill up after a few bites. The other is starting early. As she writes, “Getting a solid dose of protein within the first hour or so of waking up gives you a head start and helps distribute your intake across the day, which is much easier on your appetite than trying to cram it all in at the end.”

Here is what a 100-gram day looks like when appetite is low:

This is roughly what a day on the Sustain program looks like, pre-portioned to these targets. Two Sustain meals handle 70 to 100 grams on their own; you fill the rest with a breakfast anchor and a snack.

Protein without cooking (no-cook options for low-energy days)

On the days a GLP-1 leaves you with no appetite and no energy to cook, the goal is protein you can grab and eat in under a minute. When solids feel like too much, a shake or a blended protein-rich soup goes down when a chicken breast will not. Stir unflavored protein into oats, soup, yogurt, or your morning coffee. And keep a rough tally, because it is easy to overestimate how much you actually ate. Keep these on hand:

The amount of each no-cook option it takes to reach 20 g of protein, and the calories that costs you. Shorter bar = more protein per calorie. Bars use the same scale as the chart below, so the two are directly comparable.

• 
  Canned tuna

  ⅔ can
  91 cal
• 
  Ready-to-drink shake

  ⅔ bottle
  107 cal
• 
  Skyr

  ~¾ cup
  113 cal
• 
  Nonfat Greek yogurt

  ~1 cup
  117 cal
• 
  Lean beef jerky

  ~1½ oz
  120 cal
• 
  High-protein (ultra-filtered) milk

  1½ cups
  123 cal
• 
  Low-fat cottage cheese

  ~1 cup
  125 cal
• 
  Lean turkey jerky

  ~1¾ oz
  125 cal
• 
  Edamame (shelled)

  ~1 cup
  209 cal
• 
  Hard-boiled eggs (buy them pre-cooked)

  ~3 eggs
  246 cal

Sources: USDA FoodData Central for canned tuna, eggs, Greek yogurt, cottage cheese, and edamame; product labels for the branded items — Siggi’s plain nonfat skyr, Fairlife fat-free ultra-filtered milk, and lean beef and turkey jerky (values vary by brand; choose low-sugar). Approximate; the ready-to-drink shake assumes a 30 g protein, 160-calorie bottle. One label caution: many “protein” bars and shakes are built on refined sugar and seed oils, so read the ingredients and pick clean ones.

Protein and strength: timing around workouts

Protein preserves muscle; resistance training two to three times a week tells your body to keep it (see GLP-1 and Muscle Loss). For most people, total daily protein matters far more than precise timing, so hitting your 100-plus grams across the day is the main event. That said, a 25-to-30-gram anchor within a couple of hours of a strength session is a sensible way to spend one of your daily doses, and it fits the even-distribution pattern that supports muscle protein synthesis (Mamerow et al., 2014). Whey is a convenient choice here because it is a complete, fast-digesting protein, which is why Salas-Whalen calls it an ideal post-workout option. On a GLP-1, a post-workout shake also solves the “not hungry after exercise” problem, since it is easier to drink 25 grams than to face a plate.

Can you hit 100 grams without meat?

Yes, it just takes a little more planning, because most plant proteins are “incomplete.” Salas-Whalen’s guidance: “If you rely heavily on plant proteins, it’s best to combine complementary incomplete proteins (for example, rice and beans or hummus with whole-wheat pita) to help round out the amino acid profile of your meals.” Greek yogurt, cottage cheese, eggs, tofu, tempeh, edamame, lentils, and a plant or whey protein powder make 100 grams realistic without meat. The harder part is doing it every day.

The difference is knowing which ones give you the most per serving. Most online lists rank plant proteins per 100 grams of raw ingredient, which overstates what ends up on your plate (dried lentils look twice as protein-dense as cooked ones). These numbers are what you actually get, ready to eat:

What 20 g of protein looks like from each, and the calories it costs to get there. Shorter bar = more protein per calorie. Bars use the same scale as the chart above, so the two are directly comparable.

• 
  Nonfat Greek yogurt

  ~1 cup
  117 cal
• 
  Low-fat cottage cheese

  ~1 cup
  125 cal
• 
  Firm tofu

  ~1 cup
  167 cal
• 
  Tempeh

  3.5 oz
  195 cal
• 
  Edamame (shelled)

  ~1 cup
  209 cal
• 
  Eggs

  ~3 eggs
  246 cal
• 
  Lentils (cooked)

  ~1 cup
  256 cal
• 
  Black beans (cooked)

  ~1⅓ cups
  303 cal
• 
  Hemp seeds

  ~6 tbsp
  332 cal
• 
  Pumpkin seeds (kernels)

  ~2⅓ oz
  380 cal
• 
  Almonds

  ~3⅓ oz
  547 cal
• 
  Quinoa (cooked)

  ~2½ cups
  555 cal

Source: USDA FoodData Central. All values at cooked or ready-to-eat serving sizes; pumpkin seeds are shelled kernels (pepitas).

Stack two or three per meal to clear 25 grams per sitting. Adding a scoop of plant or whey protein powder to any of the top four gets a single meal past 40 grams.

Here is what a 100-gram day without meat can look like:

The standard behind the meals

Everything above works whether you use a meal delivery service or not. But that daily math and prep is what actually breaks people. The reason we built the Sustain GLP-1 program to a fixed protein target, 30 to 50 grams per meal and 100 to 140 grams a day, is that it is a program that counts for you, thereby removing the daily math.

The standard behind those meals is not marketing. Methodology is the only US meal delivery service whose meals were the clinical intervention in a peer-reviewed randomized crossover trial published in the American Journal of Clinical Nutrition (Gardner et al., 2022). Separately, dietary adherence was about 34% higher when meals were delivered than when participants prepared the same food themselves (Landry et al., Nutrients, 2021). These are findings about study participants, not promises about your results.

Frequently asked questions