What could cause nausea associated with drinking tea? I have tried changing tea brands and even sugar free tea but no matter hot or cold I get nausea

Other Commonalities? Food intolerance, including to tea, can be caused be additives such as sulfites, a lack of enzyme for digestion (lactase is an example for dairy), irritable bowel (but usually not food specific), or other less well characterized reasons. The magnitude of symptoms depends on the amount of food, unlike food allergy. Do you always use milk in your tea? A food/symptom diary may help pinpoint cause.