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Yes, coffee is allowed during Atkins Phase 1 if you keep it unsweetened and count any cream or sweeteners toward your daily net carbs.

Yes, black coffee fits Isagenix shake days; keep it plain and keep caffeine moderate, and skip creamers, syrups, and calorie-heavy add-ins.

Yes, plain black coffee is permitted during colon prep, but skip creamers and stop at your clinic’s final-drink cutoff.

Yes, coffee fits the Jenny Craig plan when you keep it simple—black or lightly dressed with plan-friendly add-ins.

Yes, coffee with gabapentin is usually fine in moderation, but watch sleep, jitters, and dizziness; follow your prescriber’s advice.

Yes, coffee during OMAD is fine if it’s black and unsweetened; creamers, sugar, and protein add calories that end the fast.

Yes, coffee is usually permitted with hydrocodone, but skip it near dosing and never use caffeine to counter opioid sedation.

Yes, coffee fits the Ideal Protein plan when it’s black or with up to 1 oz milk or half-and-half and no sugar.

Yes, coffee during chemotherapy can be fine in small amounts if it doesn’t worsen nausea, sleep, or dehydration—check your plan and sip mindfully.

No, for fasting blood tests stick to water; coffee, even black, can alter cholesterol, glucose, and hormone results.