No, a person with gluten intolerance cannot safely consume bread that has been baked in a clean oven if the bread contains gluten. Gluten intolerance, specifically celiac disease, is an autoimmune condition triggered by the ingestion of gluten, a protein found in wheat, barley, and rye.
Even if the oven is clean, it does not eliminate the presence of gluten in the bread. Gluten can remain in the oven even after it has been cleaned, as it can leave behind traces or cross-contaminate with other foods prepared in the same oven. Ingesting even small amounts of gluten can cause adverse reactions in individuals with gluten intolerance, such as digestive issues, nutritional deficiencies, and damage to the small intestine.
For someone with gluten intolerance, it is crucial to ensure that the bread they consume is gluten-free and made with ingredients that are safe for their condition. If a person with gluten intolerance wishes to enjoy bread, it is generally recommended that they opt for specifically labeled gluten-free bread or bake their own bread using gluten-free flours and ingredients in a dedicated gluten-free kitchen to avoid cross-contamination.