Does Pre Workout Break Intermittent Fasting? Answering Your Questions

Intermittent fasting is a popular way of eating that has gained a lot of traction in the last few years. It involves alternating periods of eating and fasting, with the fasts ranging in length from 12 to 24 hours. It has many potential benefits, including weight loss, improved metabolic health, and increased longevity.

But while fasting, it can be hard to get the energy you need to get through a workout. Many people turn to pre-workout supplements to give them the boost they need, but the question is, does pre-workout break intermittent fasting? The short answer is, it depends.

Will Pre Workout Break My Fast?

And while some supplements can definitely kick you out of a fasting state, most pre-workout supplements won’t. More specifically, Pre Lab Pro is designed to be used during intermittent fasting without breaking the fast. Technically speaking, artificial sweeteners/flavors in pre-workout won’t break your fast. BUT it won’t work in your favor either. In fact, it’s been shown to inhibit the fat-burning benefits of intermittent fasting.

Generally speaking, the performance-enhancing ingredients in pre-workout supplements don’t contain calories and thus won’t break your fast. (An exception to this is LADDER Pre-Workout, which contains 60 calories per serving).

What About Caffeine?

Short answer, yes and no. It depends on many factors, certain pre workout supplements and powders contain calories that can break your fast, others do not. If your preworkout contains caffeine, you are good as caffeine DOES NOT break a fast. While there may be minimal calories, it’s generally not enough to significantly impact your fasting period.

Should I Take Pre Workout During Intermittent Fasting?

If your goal is to maximize the benefits of your fast, then maybe not. Caffeine and other stimulants found in pre-workout can suppress hunger, but it can also lead to over-stimulation, which can impact your performance. Additionally, if you are trying to maximize fat burning, then pre-workout can be counter-productive. It has been shown to increase insulin levels, which can reduce the body’s ability to access stored fat.

That being said, if you need the extra boost to power through your workout and don’t mind the potential drawbacks, then pre-workout supplements can be a great way to get that extra edge. Just be sure to read the label and avoid any products with added calories or sweeteners.


In conclusion, the answer to the question “Does pre workout break intermittent fasting?” is that it depends. Most pre-workout supplements won’t break your fast, but they may not be the best choice if you are looking to maximize the benefits of your fast. If you decide to use pre-workout supplements, be sure to read the label and avoid any products with added calories or sweeteners.

Which pre-workout will not disrupt a fast?

If you’re looking for a pre-workout that won’t break your fast, Pre Lab Pro is designed to be used during intermittent fasting without interfering with the fast. It provides the nutrients necessary for optimal health and performance while giving you the energy you need to power through your workouts.

Does taking pre-workout supplements increase insulin levels?

If the pre-workout contains any ingredients that cause an insulin response, it is likely that taking it will break your fast. However, certain pre-workout supplements and powders do not contain any elements that would lead to an insulin response, allowing you to continue your fast without disturbance.

Does taking pre-workout supplements have an effect on fasting laboratory tests?

It is best to avoid exercising before taking a fasting blood test as it may affect the outcomes of cholesterol and glucose measurements.

Does Alani pre-workout interfere with fasting?

Consuming pre-workout during a fast is not likely to be beneficial for achieving your goals. Artificial sweeteners and flavors present in pre-workout may not technically break the fast, but they are unlikely to provide any advantages either.

Is it better to exercise before or after I do an intermittent fast?

It is best to eat something before engaging in high-intensity workout activities to ensure you have the energy to perform to the best of your ability.

Are there calories in pre-workouts?

Most pre-workout supplements do not contain calories but may have artificial sweeteners or sugar alcohols to add flavor without increasing caloric content. However, these ingredients can sometimes lead to digestive issues such as stomachache and discomfort.

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