GLP-1 diet: the complete guide to eating well on a GLP-1

There’s no special GLP-1 diet to follow. A handful of simple habits helps most, backed by a 2025 joint advisory from four nutrition and obesity medicine groups (ACLM, ASN, OMA and TOS).

Why does each meal matter more now?

You’re eating less, so each meal has more to do.

In clinical trials, people on these medications ate 16 to 39% less energy than people on a placebo, according to the advisory. The smaller amount still needs to bring protein, fiber, vitamins, minerals and fluids.

What are the basics?

Protein at every meal, regular small meals, whole foods, enough fluids and strength training.

1. Protein at every meal

The advisory suggests 1.2 to 1.6 grams of protein per kilogram of body weight per day during weight loss, often using an adjusted body weight for people with a higher body weight. On a small appetite, eat the protein first. Read how much protein you need or use the protein calculator.

2. Regular, small meals

Eat at consistent times and avoid long stretches without food. See what to eat when you’re not hungry.

3. Mostly whole, familiar foods

Lean on fruits, vegetables, whole grains, dairy, lean proteins, nuts, seeds and plant oils. Keep refined grains, added sugars, sugary drinks, red and processed meats, and most fast food to a minimum.

4. Enough fluids

Eating less can mean drinking less. Keep water nearby and sip through the day.

5. Movement, especially strength training

Strength training helps protect muscle and bone. See protecting muscle while you lose weight.

The advisory suggests at least:

Why does muscle deserve attention?

Not all the weight lost is fat, and protein plus strength training help protect muscle.

In the STEP 1 trial of semaglutide, 38% of the weight lost in a body-scan substudy was lean mass, which includes muscle, according to the advisory.

How do I ease stomach side effects?

Smaller portions, eaten slowly, with lower-fat foods and steady sips of fluid.

The advisory reports nausea in 25 to 44% of trial participants. A 2022 expert consensus notes symptoms tend to appear while a dose is being increased. It also suggests stopping when you feel full and not lying down right after a meal.

More: gentle meals for queasy days and eating around your injection day.

Which foods may feel harder?

Rich, fried or very sweet foods, large portions, fizzy drinks and alcohol, especially early on.

No food is off-limits. Small swaps, like grilled for fried, help you keep enjoying your favorites. See foods that can feel harder.

What about snacks and shopping?

Snacks help you reach your protein target, so check protein per 100 calories, fiber and added sugar.

See high-protein snacks worth buying, the label checker and the grocery list builder.

How do I eat out?

Build your order around protein, choose grilled or roasted, and box up the rest before you’re too full.

See eating out on a GLP-1.

What about the long term?

The habits you build now are worth keeping, whatever you and your prescriber decide.

In the STEP 1 trial extension, people who stopped semaglutide and its lifestyle program regained about two-thirds of the weight they had lost within a year. See coming off a GLP-1.

When should I talk to a professional?

When symptoms won’t settle, eating enough is hard, or you have questions about supplements or your medication.

Unusual tiredness, hair loss or muscle weakness are possible signs of falling short on nutrition. The advisory recommends pairing GLP-1 medications with counseling from a registered dietitian, so asking for one is a reasonable step.

Where do I start?

Pick one small change and build from there.

• Add protein to breakfast.
• Set a gentle reminder for lunch.
• Try one short strength session this week.

The starter plan is a simple place to begin. Imi plans meals like this for you each week, built around the food you already love.