Can I drink coffee on the first day of fasting?

Yes, you can drink black coffee on the first day of fasting ( 4 ). Keep it plain, with no milk, cream, sugar, or sweeteners, as these will add calories that break a fast. Some people report that coffee affects their appetite, but the evidence is limited and individual responses vary ( 5 ). That being said, too much caffeine can leave you jittery, so listen to your body and adjust your intake as needed.

How long should my first fast be?

Your first fast is often easiest at around 12 hours, using a 12:12 schedule. This includes your sleep, so much of the window passes while you rest. For example, you might stop eating at 8 pm and eat again at 8 am. If it feels manageable and remains appropriate for you, you could consider adjusting the window gradually. Go at your own pace.

How do I make the second day of fasting easier?

You can make the second day easier by staying hydrated, keeping your eating window consistent, and planning your meals ahead. Keeping water available can help you meet your hydration needs during the day ( 2 ). Experiences on the second day might be different from those on the first, but improvement isn’t guaranteed. A relaxed mindset and a little planning go a long way.

Should I count calories on the first day of fasting?

You don’t need to count calories on your first day of fasting unless you choose to do so. Intermittent fasting primarily structures meal timing, although overall food intake and nutritional quality still matter. For your first day, simply aim for balanced, satisfying meals in your eating window. You may choose whether tracking food intake is useful for your individual goals and circumstances.

Can I do a shorter fast if I feel uncomfortable?

Yes, you can do a shorter fast if you feel uncomfortable. There’s no rule that says you need to finish a set window. If hunger turns into dizziness or feeling unwell, it’s okay to eat earlier. A shorter, gentler fast is a valid starting point. There’s no need to lengthen the fasting window if it doesn’t suit you.