The full answer
A strict, lifelong gluten-free diet — currently the only treatment
The only proven treatment for celiac disease is completely and permanently removing gluten from the diet. There is no medication that allows someone with celiac disease to eat gluten safely; the diet itself is the treatment, and it needs to be followed strictly rather than “mostly.”
What that means day to day
In practice this means avoiding wheat, barley, and rye in every form, learning to spot hidden sources of gluten in processed foods, and taking cross-contact seriously at home and when eating out. Many people also work with a dietitian — see do I need a dietitian for celiac disease. For the medical background, see the NIDDK’s treatment overview.
Important context
Individual symptoms, reactions, medical histories, food products, and local labeling rules can vary. Community experiences are not medical evidence.
For personal medical decisions, diagnosis, testing, or treatment, consult a qualified healthcare professional.