<<Disclaimer: Verify this information before applying it to your situation.>> Hi, Is it common to gain weight while your are still undiagnosed and eating gluten. Before I stopped eating gluten, no matter what I was eating, I was gaining slowly but steadily weight. I felt swollen, and inconfortable in my own body. Now that I have been gluten-free for eight months, I have lost almost fifteen pounds. Any comment will be much appreciated. Johanne.