How To Prepare For 48 Hour Fast

How To Prepare For 48 Hour Fast

Written by Andrew Brewer. ⚕️Reviewed and fact checked by our medical team.

How To Prepare For 48 Hour FastIntermittent fasting can be a fun and challenging way to lose weight, helping push you to the limits of how long you can go without eating. The longer your fast, the more health benefits you have, but you have to prepare for prolonged fasts. You can’t just jump in and hope that you can last 48 hours without eating. Here’s a step-by-step guide to help get you ready for a 48-hour fast.

Key Takeaways

  • Gradually increase fasting intervals: Start with shorter fasting windows and gradually increase the duration to prepare your body for longer fasts, such as a 48-hour fast. This helps you adjust both mentally and physically to the challenges of prolonged fasting.
  • Meal prep before the fast: To break your fast in a healthy and controlled manner, engage in meal preparation before the fast begins. This helps you avoid impulsive and unhealthy food choices that may hinder your progress. Choose nutritious foods high in healthy fats, proteins, and fiber, while avoiding carbs, sugar, and saturated fats.
  • Stay hydrated: While fasting, it’s important to drink water to stay hydrated and maintain essential bodily functions. Water can also help you feel fuller and curb hunger pangs. Additionally, black coffee or tea can provide an energy boost and act as appetite suppressants.
  • Engage in physical activity: To distract yourself during the fasting period, engage in physical activities like walking or going to the gym. Staying active not only helps burn calories but also increases your chances of successfully completing a 48-hour fast. Remind yourself of your goals and motivations to stay motivated throughout the process.
  • Avoid binge eating after the fast: After completing a 48-hour fast, it’s important to resist the temptation to binge eat. Remember that the aim is to create a calorie deficit for weight loss. Binge eating may result in consuming more calories than you burn, hindering your progress and potentially leading to weight regain. Stay mindful of your food choices and aim for a gradual reintroduction of regular meals.

Slowly Increase Your Fasting Windows

You can’t jump into intermittent fasting and immediately start at the advanced levels. Instead, you need to level up to these more challenging fasts. Those who are just starting out may choose the 12:12 plan, where you eat for 12 hours and fast for 12 hours. Many of these hours are over the sleep window, so it’s not that much of a shift.

In a few weeks, when this is no longer challenging, increase the intervals to 16:8, where you fast for 16 hours and eat for eight. Do this until you reach your goal. 48 hours may seem like a long time to go without food, but if you can make it, you’ll see fantastic results and benefits.

Meal Prep Before the Fast

After the fast, you’ll likely want to eat everything you can get your hands on, but that’s not the best idea. Instead, you need to break your fast in slow and measured ways to help your body get used to eating again. It has been inactive for so long that eating too much too soon can make you feel uncomfortable.

One way to avoid this is by meal prepping before the fast. You won’t be tempted to break fast and dig in if you haven’t started yet. Too you will have the right snack on hand when you are ready to eat to prevent you from making bad choices that could set back your progress.

Pick healthy foods, especially those that are high in healthy fats, proteins, and fiber. Avoid carbs, sugar, or saturated fats, as these will be harder for your body to process immediately after a fast. One of the worst things that people do after a fast is binge eat, but remember that you’re trying to lose weight.

You want to burn more calories than you take in, so if you binge eat after a fast, it will be difficult to keep that pattern. Instead, you will skew the other way and put the weight back on as you’re eating more calories than you’re burning.

Drink Water

During your fasting windows, you’ll likely be hyper-fixated on wanting to eat. While you can’t do that, you can drink water, which can help your body feel like it’s full. It can be tempting to avoid all food and drink so that you’re not tempted to break your fast, but you need to stay hydrated to keep your body’s important processes going.

If you need a pick-me-up, you can also drink black coffee or tea. In addition to giving you more energy, these can also be appetite suppressants, so you don’t feel as hungry.

Get Active

As you’re in the middle of the fast, you may need to do things to distract yourself. Take a walk or go to the gym. Get active! You can help burn more calories, increasing your weight loss when you get moving. This is another great way to prepare for your fast.

The first few hours may be rough, so the more you can keep yourself busy, the more likely you are to have a successful 48-hour fast. It’s challenging for a reason, so as you push your body to the limits, remind yourself why you’re doing what you’re doing. You’ve got this!


  • Can I start with a 48-hour fast if I’m new to intermittent fasting?

It’s generally recommended to gradually increase fasting intervals. Start with shorter fasting windows, like the 12:12 plan, and work your way up to longer fasts, such as the 48-hour fast, as your body adjusts to the fasting process.

  • What should I eat before starting a 48-hour fast?

It’s advisable to engage in meal prep before the fast. Choose healthy foods that are high in healthy fats, proteins, and fiber. Avoid carbs, sugar, and saturated fats, as they may be harder for your body to process immediately after the fast.

  • Can I drink anything during the 48-hour fast?

While you can’t consume food, it’s important to stay hydrated. Drink water throughout the fasting period to support essential bodily functions. Black coffee or tea can also be consumed for an energy boost and to help suppress appetite.

  • Is it necessary to exercise during the 48-hour fast?

Engaging in physical activity can help distract you during the fasting period. Taking walks or going to the gym can burn calories and potentially aid in weight loss. However, listen to your body and adjust the intensity of your workouts accordingly.

  • What should I do after completing a 48-hour fast?

It’s crucial to avoid binge eating after the fast. Gradually reintroduce regular meals and make mindful food choices to maintain a calorie deficit for weight loss. Remember to focus on sustainable habits rather than temporary fixes.

  • Can anyone do a 48-hour fast?

Fasting may not be suitable for everyone. If you have underlying health conditions or concerns, it’s important to consult with a healthcare professional before attempting a prolonged fast. They can provide personalized guidance based on your individual circumstances.

  • Are there any potential side effects of a 48-hour fast?

While intermittent fasting can have numerous benefits, it may also lead to side effects such as hunger, fatigue, or dizziness. These symptoms are usually temporary and subside as your body adapts to the fasting routine. If you experience severe or persistent side effects, consult a healthcare professional.

  • Can I take supplements during a 48-hour fast?

It’s recommended to consult with a healthcare professional or a registered dietitian regarding supplement usage during fasting periods. They can provide guidance on specific supplements that may be suitable for you and ensure they align with your fasting goals.

  • How often can I do a 48-hour fast?

The frequency of 48-hour fasts depends on individual factors and goals. It’s important to listen to your body and give it enough time to recover between fasts. Consulting with a healthcare professional or a registered dietitian can help determine a fasting schedule that suits your needs.

  • What if I can’t complete the full 48 hours of fasting?

It’s okay if you’re unable to complete the full 48-hour fast initially. Fasting can be challenging, especially for beginners. Focus on gradually increasing fasting intervals over time and celebrate the progress you make. Remember, even shorter fasting durations can still offer health benefits.

Andrew Brewer

Andrew Brewer

Andrew Brewer started to give people the guidance that he never received when he was first starting. His goal is to make your goals achievable and to offer you only the best fasting apps that the internet has to offer. You're not on your own - Andrew and the entire family of reviewers at are here with you every step of the way!