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No. Skip caffeine for several hours (often 4–24) before a coronary calcium score to steady your pulse and keep images sharp.

Yes, standard workplace panels don’t include caffeine; sensible intake before screening is fine, but big doses can raise jitters and bathroom trips.

Yes, caffeine before a CT is fine for most exams, but heart imaging often asks you to avoid it for 8–12 hours—follow your center’s prep.

No, classic bubble tea isn’t keto; with adjustments, a low-carb version of bubble tea can fit strict carb limits.

No—butter-and-MCT coffee adds calories, so it breaks an intermittent fast even though plain black coffee usually doesn’t.

No, caffeine after gastric bypass is off-limits early; reintroduce in stages with your bariatric team’s OK.

Yes, caffeine after bariatric surgery can return once your team clears you—often 4–8 weeks—starting with small, low-acid, unsweetened sips.

Yes—many people can enjoy a small coffee after gallbladder surgery, but start low and pace reintroduction to avoid cramps or loose stools.

Yes, boba tea can fit keto only if you skip tapioca pearls and sweeteners, or use low-carb swaps like jelly, cream, and zero-sugar syrups.

Most prep plans allow plain black tea on clear-liquid day, without milk, and you stop 2–4 hours before anesthesia per your doctor.