When you are on a gluten-free diet, your intestines get more fiber to clean themselves. More fiber means a cleaner and healthier gut which improves the absorption of the nutrients in your body.
When you are underweight, healthy weight gain on a gluten-free meal plan is actually desirable. But after a point, the extra pounds you gain only add to the obesity or unhealthy weight gain, which may lead to many other health problems such as cardiovascular diseases.
The weight gain on a gluten-free diet actually happens because most people do it the wrong way. Adding more fiber and healthy food to your diet must not make you obese but healthy. Learn the proper way of adding all the nutrition to your diet and still stay on a healthy scale.
While your intestines are healing, it does not mean you can return to the unhealthy lifestyle without damaging it again. Consistency is the key to gaining the full benefits of a gluten-free diet. However, you have to learn how to do it right.