The full answer
Serious enough to take real precautions around
Unlike some food sensitivities where a small amount might be tolerated, celiac disease can react to even trace levels of gluten from cross-contact — research suggests amounts as small as a few dozen milligrams can trigger an immune response and intestinal damage in some people.
What this means practically
This is why simple precautions matter: separate cutting boards, dedicated pots and pans or careful cleaning, and asking specific questions when eating at restaurants — not out of excessive caution, but because the threshold for reaction is genuinely low.
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.