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Yes, sometimes. For abdominal ultrasound, fast 6–8 hours; for pelvic ultrasound, arrive with a full bladder; for many other scans, regular meals are fine.

No, for fasting blood tests you shouldn’t eat for 8–12 hours; some tests allow a light meal, so follow the instructions for your specific blood test.

Yes, most scans allow normal eating before an MRI, unless you need anesthesia, bowel imaging, or specific abdominal studies that require short fasting.

Yes, after a colonoscopy you can eat—start with clear liquids, then soft, low-fiber foods as tolerated, unless your doctor says otherwise.

Yes, after a routine dental cleaning you can eat soon; if fluoride varnish was applied, wait about 30 minutes and choose soft, not-hot foods.

Yes, you can eat after endoscopy once swallowing returns; start with clear liquids, then soft foods within a few hours unless your clinician advises otherwise.

Yes, you can eat after whitening strips, but stick to a white diet and avoid staining or acidic foods for 24–48 hours to protect whitening results.

Yes, you can eat after a root canal once numbness fades; start with soft, cool foods and avoid chewing on the treated side for 24 hours.

No, crunchy foods can break braces; choose softer swaps and chew with your back teeth for safer bites.

Yes, you can eat cold food during pregnancy when it’s pasteurised, well-washed, and safely handled; heat high-risk items like deli meats until steaming.