How do you use ProLon fasting shake to extend your fasting window?

October 20, 2025 •

5 min read

Based on decades of research from the University of Southern California, the ProLon Fasting Shake is a scientifically formulated drink designed to provide nourishment without disrupting the body's fasted state. Understanding how you use ProLon fasting shake correctly is key to unlocking its unique benefits for extending your fasting window.

Quick Summary

The ProLon fasting shake supports fasting goals by providing essential nutrients and healthy fats while avoiding the triggering of nutrient-sensing pathways. A single sachet is mixed with water and consumed during your fasting window to manage hunger and maintain a fat-burning state.

Key Points

Simple Mixing: Mix one sachet with 250ml of water in a shaker, bottle, or blender until fully dissolved.
Extend Fasting Window: Drink the shake in the morning to prolong your overnight fast and delay your first meal, enhancing your intermittent fasting schedule.
Supports Fat Burning: The proprietary plant-based formula is designed to help maintain ketosis, encouraging your body to burn stored fat for energy.
Provides Essential Nutrients: Each shake delivers 21 vitamins and minerals, healthy fats, and fiber to nourish your body while it remains in a fasting state.
Manage Hunger: Use the shake to effectively curb hunger pangs during your fasting window, making it easier to adhere to your diet.
Backed by Science: Developed through decades of research by L-Nutra and validated by multiple clinical studies, the shake's formulation is proven to work.
Distinguish from FMD: This shake is for daily or intermittent fasting use, not to be confused with the complete ProLon 5-Day Fasting Mimicking Diet program.

Understanding the ProLon Fasting Shake

Developed by L-Nutra, the company behind the popular 5-day Fasting Mimicking Diet (FMD), the ProLon Fasting Shake is engineered using the same core scientific principles. It provides premium, plant-based nutrition designed to support the body's fasted state. Unlike a standard meal replacement, this shake is specifically formulated with a proprietary blend of ingredients—including healthy fats from macadamia and almonds, and plant-based protein—that do not activate the body's nutrient-sensing pathways. This allows you to reap many of the benefits of fasting, such as encouraging ketosis and cellular renewal, while still consuming calories.

The Science Behind the Shake

For over two decades, research has focused on how to obtain the benefits of fasting without undergoing complete food restriction. The Fasting Shake is a direct result of this work, validated by clinical trials and research from 18 global universities. The specific balance of macronutrients is crucial, as it keeps the body's cellular machinery believing it is still in a fasted state. This is a significant advantage for those practicing intermittent fasting who want to suppress hunger and sustain energy without ending their fast prematurely.

How to Use the ProLon Fasting Shake

Using the shake correctly ensures you get the most out of the patented technology. The process is straightforward and fits seamlessly into any intermittent fasting regimen.

Step-by-Step Preparation Guide

Gather ingredients: You will need one sachet of ProLon Fasting Shake mix and 250 ml (about 1 cup) of water.
Choose your mixing method: For a smooth consistency, a blender is recommended. A shaker bottle or simply stirring vigorously in a glass will also work.
Combine and mix: Pour the contents of the sachet into the water. If using a shaker, close the lid securely and shake until fully dissolved. For a blender, blend for a few seconds until smooth.
Enjoy: Drink the shake slowly, savoring the flavor. The shake is available in flavors like chocolate and vanilla.
Additions: For a slight flavor variation, you can sprinkle a dash of cinnamon into the mix without affecting the fast.

Optimal Timing and Usage

The flexibility of the fasting shake makes it a versatile tool for various fasting schedules. The ideal timing depends on your personal goals and eating pattern.

Extending an overnight fast: Many users consume the shake in the morning after their initial overnight fast to extend the fasting window and delay their first meal. This helps to curb hunger and keep the body in a fat-burning mode for longer.
As a hunger-control snack: If you feel hunger pangs during your fasting window, the shake can serve as a satisfying and nutrient-dense snack that won't break your fast.
Replacing breakfast: For those practicing time-restricted feeding (TRE), the shake can act as a nutritious breakfast replacement that fits within your eating window while promoting a deeper fasted state.

Fasting Shake vs. 5-Day FMD Kit

While both products are from the ProLon family and are rooted in fasting science, they serve different purposes. The shake is a daily tool for intermittent fasting, whereas the 5-Day FMD is a complete program for cellular rejuvenation.


Feature	ProLon Fasting Shake	ProLon 5-Day FMD Kit
Purpose	Extends intermittent fasting, daily hunger management	Complete 5-day fasting mimicking program
Usage Duration	Can be used daily or as needed	Consumed for 5 consecutive days
Contents	Single sachet of shake mix	Pre-packaged soups, bars, snacks, drinks, supplements
Caloric Intake	Low calorie, designed not to trigger nutrient-sensing pathways	Varies by day (approx. 1100 kcal on Day 1, 700-800 kcal on Days 2-5)
Key Outcome	Supports ketosis and fat burning	Triggers deeper cellular autophagy and rejuvenation

Benefits of Incorporating the Shake into Your Routine

Beyond the primary function of prolonging your fast, the ProLon shake offers several notable advantages for your overall health:

Fat-Focused Weight Management: The formulation helps the body burn stored fat for fuel, potentially aiding in weight loss while protecting lean muscle mass.
Nutrient Support: Each shake delivers 21 essential vitamins and minerals, ensuring your body receives important micronutrients even during calorie restriction.
Improved Gut Health: Ingredients like inulin from chicory support normal bowel function and promote a healthy digestive system.
Convenience: The pre-portioned sachets are easy to mix and perfect for on-the-go use, making fasting more manageable and accessible.

Maintaining a Healthy Fasting Lifestyle

While the ProLon fasting shake is an excellent tool, it is important to remember that it is a supplement to, not a replacement for, a healthy and balanced lifestyle. For long-term success, combining the shake with a nutritious diet outside of your fasting window and regular exercise is recommended. The shake makes managing intermittent fasting easier, but it is the overall dietary habits that drive lasting results.

In conclusion, the ProLon fasting shake is a powerful, science-backed supplement that simplifies and enhances the intermittent fasting experience. By following the simple mixing instructions and strategically incorporating it into your routine, you can effectively manage hunger, extend your fasted state, and support your body's natural fat-burning and renewal processes. For more detailed information on the science, consider visiting the official ProLon website.

Conclusion: Optimizing Your Fast with the ProLon Shake

The ProLon fasting shake provides a strategic way to support your intermittent fasting journey with minimal disruption to your daily life. Its science-backed formulation allows you to extend your fasted state, promote fat-burning, and manage hunger, all while providing essential nutrients. Consistent and correct use can enhance the benefits of your fasting regimen, supporting a healthier metabolic state and improved energy levels. Always consult a healthcare provider before starting any new diet, especially if you have underlying health conditions.

Note: The ProLon Fasting Shake is an intermittent fasting supplement and differs from the complete ProLon 5-Day Fasting Mimicking Diet (FMD) kit. For cellular rejuvenation benefits associated with prolonged fasting, the 5-day FMD program is recommended.

What are the ingredients in ProLon Fasting Shake?

The ingredients include plant-based protein and fats from almond and macadamia nut flour/oil, prebiotic fiber from chicory inulin, konjac, flaxseed, and a blend of vegetables and fruits.

Comparison of Fasting Shake Benefits vs. Water-Only Fasting


Aspect	ProLon Fasting Shake	Water-Only Fasting
Nutrient Intake	Provides 21 vitamins, minerals, and healthy fats	Only water is consumed, no nutrients
Hunger Management	Formulated to reduce hunger pangs during the fast	Can lead to strong hunger and cravings
Metabolic Support	Supports ketosis and fat burning	Triggers ketosis but requires stricter discipline
Convenience	Easy to prepare on-the-go sachets	May require more willpower to sustain
Cellular Renewal	Promotes fasting state for cellular renewal	Triggers cellular renewal but with greater deprivation

Best Practices for Using the Shake

Listen to your body: Pay attention to how your body responds to the shake. Adjust the timing based on when you feel the most hungry during your fasting window.
Hydrate adequately: Continue to drink plenty of water alongside the shake to maintain proper hydration levels.
Store correctly: Keep the sachets in a cool, dry place away from direct sunlight to preserve the quality of the ingredients.
Combine with a healthy diet: For sustainable results, pair the fasting shake with a balanced and nutritious diet during your eating windows.

Ultimately, integrating the ProLon fasting shake into your routine can be a game-changer for your intermittent fasting goals, offering a palatable and effective way to sustain a fasted state while feeling nourished.

Frequently Asked Questions

To prepare the shake, simply mix one sachet of the powder with 250ml (about 1 cup) of water. You can use a shaker, a water bottle, or a blender, with a blender providing the smoothest consistency.

You can drink the ProLon fasting shake in the morning to extend your overnight fasting window, use it as a snack during your fasting period to manage hunger, or incorporate it as a breakfast replacement within a time-restricted eating pattern.

The ProLon fasting shake is specifically formulated with a patented blend of ingredients that are designed not to trigger the body's nutrient-sensing pathways, allowing you to consume it while maintaining a fasted state.

The shake contains a proprietary blend of plant-based ingredients, including almond and macadamia nut flour or oil, chicory inulin for fiber, coconut palm sugar, konjac, flaxseed, and a mix of vegetable and fruit powders.

No, the fasting shake is a separate product designed for daily or intermittent fasting use. It leverages the same technology as the 5-day Fasting Mimicking Diet (FMD) but is used for extending fasting periods rather than as part of the complete FMD kit.

Yes, for a minor flavor enhancement without breaking your fast, you can add a small sprinkle of cinnamon to the shake mixture. Avoid adding other sweeteners or ingredients that could activate nutrient pathways.

Benefits include supporting fat burning and weight management, providing 21 essential vitamins and minerals, promoting gut health with prebiotic fiber, and offering a convenient way to manage hunger during fasting.

The shake supports intermittent fasting by managing hunger and providing nutrients during your fasting window without causing the body to exit its fasted, fat-burning state.