Experts Warn GLP-1 Drugs and Low-Carb Diets Leave Americans Short on Fiber

Protein craze and appetite-suppressing medications raise concerns about balanced nutrition

Mar. 22, 2026 at 2:23pm

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Experts are warning that the growing popularity of protein-focused diets and GLP-1 medications like Ozempic and Wegovy, which suppress appetite, are leading many Americans to neglect essential fiber intake. While protein and carb reduction can offer benefits, nutritionists caution against oversimplifying the role of carbohydrates and emphasize the importance of balanced, nutrient-dense diets.

Why it matters

The surge in protein branding and carb restriction, often promoted by social media influencers, coincides with the rise of GLP-1 medications. Experts worry this trend may disconnect individuals from their natural hunger and satiety cues, potentially leading to inadequate fiber and other nutrient intake, which is crucial for overall health.

The details

Protein-enhanced foods and high-protein meal plans, often advocating for carbohydrate reduction, are increasingly popular, especially when used in conjunction with GLP-1 drugs that suppress appetite. However, nutritionists caution that this overlooks the vital role of fruits, vegetables, and whole grains, which provide essential fiber, vitamins, and nutrients. They emphasize the complementary roles of protein and carbohydrates, with protein helping to provide a feeling of fullness and carbohydrates offering essential energy and supporting digestive health.

  • The latest Dietary Guidelines for Americans were released in 2025.

The players

Lee Cotton

A registered dietitian nutritionist in Florida.

Whitney Stuart

A Dallas-based nutritionist who emphasizes the importance of prioritizing high-fiber carbohydrates.

Carlo Filippone

The founder of the Chicken Pound meal prep company, who suggests a 'protein-first' approach to plate composition.

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What they’re saying

“The illusion is [that carbohydrates are] just pasta and croissants and doughnuts.”

— Lee Cotton, Registered Dietitian Nutritionist

“Believe of protein as the building block that helps you feel full, while carbohydrates – especially those high in fiber – provide essential energy, support your digestive health and aid preserve your metabolism on track.”

— Whitney Stuart, Nutritionist

“Fill your plate with protein, add veggies next and complex carbs last and least. Refined carbs should be a once-in-a-while indulgence.”

— Carlo Filippone, Founder, Chicken Pound

What’s next

The new Dietary Guidelines for Americans are expected to be released in 2030, providing an opportunity to further address the balance between protein, carbohydrates, and fiber in a healthy diet.

The takeaway

While protein and carb reduction can offer benefits, experts emphasize the importance of balanced, nutrient-dense diets that prioritize a variety of whole, unprocessed foods, including fiber-rich carbohydrates, to ensure adequate intake of essential nutrients and maintain overall health.