Last updated on August 29th, 2024 at 08:50 am
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Are you a fitness enthusiast navigating the world of intermittent fasting?
Imagine for a moment that it’s 4:30 PM—just a half-hour before your workout, and the familiar urge to energize is so tempting.
But you’re also committed to intermittent fasting, where the window you allow for consuming your daily nutrition may not perfectly align with your usual pre-workout snack.
The dilemma is real, and you’re not alone in facing it. How do you strike the right balance between your pre workout supplement needs and your fasting window?
The secret may lie in a little-known but incredibly impactful player in the fitness field: the pre-workout supplement. When used correctly, it can kickstart your session and enhance performance without breaking your fast.
But not all pre-workouts are created equal, especially when you’re navigating the particularities of intermittent fasting and perhaps even keto. Artificial sweeteners, calorie content, and, yes, even the potential to spike insulin can all play into which pre-workout is best for your needs.
This comprehensive guide will lead you through the Best Pre Workout for Intermittent Fasting – a topic that has been making waves in the fitness industry recently.
With detailed insights, ingredient analyses, and real-world application, you’ll be well-equipped to select the pre-workout that aligns with your workout regime and health goals.
Note: Before we continue, I have a special gift for you. I call this the IFLG, which stands for Intermittent Fasting Link of Gold. This link will give you access to all of our articles and product recommendations about intermittent fasting. Here is your IFLG link ► IFLG
One more thing: If you’re a Medium member, you can read this post ad-free on Medium by clicking HERE.
Understanding Your Needs

Before we jump into the review of the best pre-workout supplements for intermittent fasting, it is important to understand how they stand out in the market. Pre-workouts for intermittent fasters demand a careful blend of ingredients, ensuring they enhance energy and endurance without compromising on the fasting benefits of calorie control and the maintenance of the fasted state.
In particular, steer clear of pre-workouts with high amounts of artificial sweeteners or fillers that can potentially elicit an insulin response, breaking the fast. Look instead for products containing natural extracts and zero-calorie sweeteners that maintain the fast yet support your physical activity. (1)
You’ll also want to keep an eye on caffeine content. While eating this stimulant is a staple in most pre-workouts for its energy-boosting properties, individuals vary in their sensitivity and can feel the effects long after the workout, which might not be ideal for the fasted state. (2)
Finally, the best pre-workouts should assist with increasing the body’s fat oxidation during workout sessions. This helps you harness fat for energy, which complements the fat-burning benefits of fasting and can be particularly aligned with keto practitioners’ exercise routines. (3)
The 5 Best Pre Workout for Intermittent Fasting
1. Performance Lab® Pro ►(Editor’s Choice)

Performance Lab® Pre is strategically formulated to deliver a clean, sustained, and robust energy boost that aligns perfectly with the needs of those on intermittent fasting schedules.
✅ The Ingredients That Matter
Featuring patented and cutting-edge ingredients such as MicroActive® CoQ10, Setria® Performance Blend, and BioPerine®, Performance Lab® Pre kicks into gear without providing your body with artificial or unneeded elements.
✅ The Caffeine Experience
A moderate 80 mg caffeine sourced from natural coffee beans provides a gentle lift without overpowering your system, making it ideal for those who are caffeine-sensitive or looking for a more moderate approach to their pre-workout energizing.
✅ Our Verdict
Our in-depth analysis of this supplement has led us to conclude that Performance Lab® Pre is superior in its minimal approach to formulation. It supports endurance and muscle performance through heart-healthy nutrients and boosts blood flow, essential to combat the fatigue that can sometimes set in during fasting.
✅ Personal Experience
Personally incorporating this supplement in fasted workouts has led to clear energy improvements without feeling any jitters or a post-workout crash. It integrates seamlessly into my fasting window, ensuring that I receive the physical benefits of the workout without sacrificing the physiological health benefits of fasting.
2. PEScience Prolific Pre-Workout

PEScience Prolific Pre-Workout is designed to offer a balanced blend of energy and pump-boosting ingredients without upending caloric restrictions or fasting-related benefits.
✅ The Pump Potential
Arginine Nitrate, Citrulline, and Agmatine Sulfate work to significantly enhance pump and blood flow, a marked feature that PEScience Prolific takes pride in. These attributes support effective workouts without imparting any caloric load—crucial for those fasting or on strict dietary regimes.
✅ The Taste Test
In our rigorous evaluations, PEScience Prolific’s flavor options have consistently ranked high, an underrated bonus that can make or break the routine for those sensitive to off-putting tastes during their fasted state.
✅ Our Stance on Sweeteners
The sweeteners in PEScience Prolific align with our approved list for fasting—stevia and sucralose have been well-tolerated without any noticeable interference in the fasted state.
✅ The Precision Caffeine Score
The 160 mg of caffeine per serving is measured out to provide an effective energy lift without the potential for overstimulation, which can sometimes happen with pre-workouts that are more aggressively dosed.
3. Cellucor C4 Pre-Workout

Cellucor C4 is a household name among the fitness enthusiasts and aficionados, and its Pre-Workout does not disappoint in the fasting department.
✅ The Energy Burst
For those looking for a more classic, intense energy spike, Cellucor C4’s 150 mg of caffeine anhydrous may hit the spot. Though bordering on the higher side, we found it balanced out by the 1g Creatine Nitrate blend, promoting strength and endurance without excess stimulants.
✅ The Additional Diet Support
C4’s formula also includes N-Acetyl L-Tyrosine, which we’ve noticed to support performance during fasted workouts, helping the body maintain focus and mood during more demanding exercises.
✅ Ingredient Integrity
Despite being a well-established brand, Cellucor keeps its C4 Pre-Workout clear from proprietary blends, a refreshing approach that allows you to see exactly what and how much of the active ingredients you’re getting.
4. Alani Pre-Workout

Alani is an emerging brand that is gaining popularity with its focus on female health and fitness. The Alani Pre-Workout is another contender for those looking for clean and precise pre-exercise nutrition during fasting periods.
✅ The Sweetness Story
Alani’s blends are noteworthy for their inclusion of monk fruit and erythritol, two non-insulinogenic sweeteners that assist in maintaining the fasted state without compromising taste or texture.
✅ The No Jitter Guarantee
With a modest 200 mg of caffeine from green tea and green coffee beans, this pre-workout provides a consistent energy level without the uneasy post-exercise jitters.
✅ Performance Promise
Our team found this pre-workout to offer a solid improvement in training intensity and endurance, supported by a clear increase in blood flow and readiness for strenuous workouts without being overpowering on the system.
5. Optimum Nutrition Gold Standard Pre-Workout

Famed for their post-exercise supplementation, Optimum Nutrition also provides an impactful pre-Workout option that aligns well with fasting regimes.
✅ That Classic Brand Assurance
Optimum Nutrition’s reputation for quality and effectiveness is echoed in their Pre-Workout, which doesn’t disappoint in delivering the energy and pump-inducing effects essential for fasted workouts – all within a fasting-friendly formulation.
✅ Flavor and Mixability
A consistent highlight in our trials, the balanced roster of flavors and the ease-of-mixing makes Optimum Nutrition a winner in terms of convenience and taste satisfaction.
✅ The Perfected Profile
Vitamins D, B6, B12, and Niacin work alongside performance-based ingredients to support overall health and well-being during the fasting workout, a comprehensive touch we appreciate.
Conclusion: What is the Best Pre Workout for Intermittent Fasting?
Deciding which pre-workout to include in your intermittent fasting and exercise regimen is a deeply personal choice, rooted in your current health status, dietary sensitivities, and workout intensity.
The five pre-workouts explored above each offer a unique blend of ingredients that cater to the requirements of intermittent fasting while ensuring that your workouts remain effective, energized, and aligned with your overall health goals.
Make sure to analyze the label, identify how each ingredient might affect your fasting regime, and always follow the serving size recommendations. Combining a top-tier pre-workout with a thoughtful fasting routine can lead to a synergistic boost in your workout regimen, unlocking enhanced physical performance and fortified health strategies.
FAQs
Is it really necessary to use a pre-workout during fasting?
Absolutely. Utilizing a pre-workout while fasting can dramatically elevate your exercise performance. It’s about optimizing what you bring to the table—even when that table is fasting. By feeding your muscles with the right blend of supplements, you’re not just going through the motions; you’re maximizing every rep, every set, every stride.
Won’t pre-workout supplements break my fast?
Not at all, and here’s why: our recommended pre-workouts are specifically formulated to enhance your fasting and training experience, not detract from it. They are calibrated to stimulate your energy levels and improve workout performance without introducing caloric substances that would disrupt your fasted state. It’s targeted support, precisely where and when you need it.
How do I choose the best pre-workout for my fasting routine?
Start by knowing your own body composition and your goals. Then, look at the label. The best pre-workout for fasting isn’t just about low calories; it’s about the synergy between the ingredients and your fasting regime.
Consider the caffeine content, whether the sweeteners fit into your fasting guidelines, and if there are any additional benefits like improved focus or endurance. Our roundup offers a perfect starting point—meticulously vetted to align with most fasting protocols.
Can I use these pre-workouts if I’m not fasting?
You bet. While these pre-workouts shine in the context of fasting, they’re stacked with benefits that go beyond calories. Enhanced focus, muscle strength, sustained energy, and potent nutrition—elements that thrive inside and outside fasting. They’re not just about complementing your fasting routine but elevating your overall fitness game.
Does C4 break intermittent fasting?
The short answer is no, C4 doesn’t break the bank—or your fast. It’s formulated with an understanding of the needs of those practicing intermittent fasting. The key lies of course, in its componentry; it avoids caloric content that would typically disrupt a fast. With its careful balance of caffeine for energy and added supplements for performance, it’s crafted to complement your fasted state, not compromise it.
Can you workout during a 16 hour fast?
Absolutely, you can—and perhaps, you should. Exercising during a 16-hour fast can intensify the benefits of your fasting regimen. The trick is to arm yourself with the right pre-workout that aligns with the principles of your fast.
A carefully chosen pre-workout can amplify your energy levels extra boost you and enhance muscle performance, ensuring you not only endure but excel in your workouts, all while maintaining the integrity of your fasting state.
Will beta-alanine break a fast?
No, beta-alanine will not break your fast. It’s a non-caloric amino acid that’s often included in pre-workout formulas for its ability to reduce muscle fatigue and boost performance. Since it doesn’t have caloric value, it won’t trigger an insulin response that would break a fast.
Instead, it acts as a strategic ally to your fasting, aiming to extend the duration and effectiveness of your workouts without interfering with your fasted state.
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Ali Webster is a seasoned researcher, communicator, and Registered Dietitian with a diverse background encompassing government, nonprofits, academia, and health care. The core belief is that science should be made accessible, understandable, and relevant to all individuals, driving the motivation behind their work. Proficient in conducting and interpreting research to shape nutrition policy decisions, the individual also excels in nutrition and health communication, consumer research survey development and implementation, and clinical nutrition. Holding a Doctorate of Philosophy with a focus on Nutrition and Epidemiology from the University of Minnesota, their dietetic internship emphasized medical nutrition therapy.