Research shows that body weight often changes after switching to a gluten-free diet. In some cases, it increases, and in others, it decreases. It is important to understand why these changes occur, so that you can take the necessary steps to maintain a healthy body weight.

Why does body weight change after starting a gluten-free diet?

In celiac disease, gluten damages the lining of the small intestine, leading to poor absorption of nutrients. When you switch to a gluten-free diet, the intestinal lining begins to heal, which means the body absorbs nutrients and calories better. This improved absorption can lead to weight gain, especially if you do not adjust portion sizes or the types of foods you eat.

Additionally, many gluten-free products, such as bread, cookies, and snacks, are often higher in fat and sugar and lower in fiber than their gluten-containing counterparts. This means that consuming these products can contribute to weight gain if not eaten in moderation.

Statistical data on changes in body weight

A study published in the journal Alimentary Pharmacology & Therapeutics found that after starting a gluten-free diet:

• 69% of undernourished patients gained weight,
  
  
• 18% of overweight patients lost weight,
  
  
• 42% of obese patients lost weight,
  
  
• in the rest, body mass index (BMI) did not change significantly.

This means that a gluten-free diet can lead to both weight gain and weight loss, depending on a person's initial condition and eating habits.

How to prevent unwanted weight gain?

• Choose whole foods: Instead of processed gluten-free products such as cookies and snacks, focus on natural foods like fruits, vegetables, legumes, nuts, and seeds.
  
  
• Check nutritional values: Pay attention to the fat, sugar, and fiber content in gluten-free products. Choose those with less added sugar and more fiber.
  
  
• Control portion sizes: Since your body now absorbs nutrients better, you may not need the same amount of food as before. Listen to your body and eat until you’re full, not stuffed.
  
  
• Be physically active: Regular physical activity helps regulate body weight and improves general well-being. Choose activities you enjoy, like walking, swimming, or cycling.
  
  
• Track your progress: Keep a food and activity diary to help you identify patterns and adjust your lifestyle as needed.

Switching to a gluten-free diet is necessary to manage celiac disease, but it can also bring changes in body weight. By understanding the reasons for these changes and adopting healthy eating habits, you can maintain or achieve a healthy body weight. If you have questions or need help with dietary planning, consult a dietitian or nutritionist.