Weight-Loss Plateaus and GLP-1 Medications: What the Science Shows

The two year results from the STEP 5 trial showed that after about 60 weeks on a GLP-1, people tend to stop losing weight and hit a plateau. Some of the additional data from these studies suggest some of the appetite suppressive effects of GLP-1s may also begin to wane, although most if not all of the weight loss was maintained out to the two-year timepoint. In addition, a major extension of the STEP-1 trial showed that participants regained approximately two-thirds of the weight lost within one year of discontinuing semaglutide, along with reversals in cardiometabolic improvements.

This highlights why nutrition quality, protein intake, resistance training and carb optimization are essential, not just during GLP-1 use, but especially when you transition to maintenance, with or without a GLP-1.

GLP-1 medications can be powerful tools. They may reduce your appetite, improve blood sugar control and help many people lose significant weight. But they don’t cancel your biology. Your metabolism still adapts. Muscle still matters. And long-term success still depends on what you eat and how you move.

To maintain your results, even during a GLP-1-induced weight loss plateau, or if you discontinue the medications, stick with these strategies:

1. Protect your lean mass.

Aim for adequate daily protein and prioritize resistance training two to three times per week. Muscle is your metabolic engine. The more you preserve, the more resilient your metabolism remains.

2. Don’t under-fuel.

You might not feel hungry, which makes it easy to eat too little. Some studies have found that slower rates of weight loss are associated with smaller reductions in resting energy expenditure—meaning your metabolism stays more robust. Consistently under-eating can put your body into “starvation mode”, slowing your calorie burning and increasing the likelihood of a plateau. Focus on your nutrient density, not just calorie reduction.

3. Optimize carbohydrates.

Rather than eliminating carbs entirely, adjust your quality and quantity. Center your meals around protein, fiber-rich vegetables and healthy fats, and tailor your carbohydrate intake to your metabolic needs and activity level. Atkins low carb plans are customized to help you.

4. Plan for maintenance from day one.

The data are clear: weight regain is common after stopping GLP-1 therapy. The habits you build during treatment, protein prioritization, strength training, metabolic flexibility and structured eating patterns are lifestyle changes that help maintain your results and push past a plateau.

GLP-1s can help quiet food noise and create momentum. But sustainable metabolic health comes from preserving muscle, nourishing your body strategically and building a lifestyle your metabolism can thrive on.