Guide

Yes, you can eat potatoes every day when portions stay moderate and your meals still include protein, vegetables, and healthy fats.

Yes, you can eat raw macadamia nuts as long as they are fresh, properly stored, and eaten in sensible portions.

Yes, many cholesterol tests still require 9–12 hours of fasting, though nonfasting cholesterol panels are now common for routine screening.

Black coffee during intermittent fasting usually does not break a fast, but sweeteners, cream, or flavored syrups can.

Yes, most amino acid supplements break a fast by adding calories and triggering nutrient signals, though tiny training doses may matter less.

No, brushing your teeth during a fast doesn’t break the fast if you avoid swallowing water, toothpaste, or mouthwash.

Yes, long-term heavy drinkers may clear alcohol a little faster at first, but damage from alcoholism often slows alcohol metabolism later.

Yes, your metabolism can be too fast when health or hormone problems drive calorie burn higher than your body can comfortably handle.

During fasting, sleep often feels lighter or broken because hormone shifts, late meals, and low blood sugar disturb your usual body clock.

No, most 0 calorie energy drinks do not fully break a fast, yet sweeteners and caffeine can blunt appetite, insulin, and gut rest benefits.