The full answer
No — not before you've been properly tested
It’s generally recommended to keep eating gluten normally until celiac disease testing is complete, since both blood tests and biopsies depend on active gluten exposure to produce accurate results.
If you've already gone gluten-free
If gluten has already been reduced or removed, tell your doctor before testing — they may recommend a gluten challenge to reintroduce it under supervision so results aren’t falsely reassuring.
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.