Why Does Pre-Workout Make You Itch?

Felt a strange itching sensation after taking pre-workout and wondering what's going on? Read on for the science behind this surprisingly common side effect.

Key Takeaways

• Pre-workouts can cause itching or tingling sensations.
• That's often due to beta-alanine stimulating nerve endings in the skin.
• Experts consider beta-alanine to be safe, and this itching sensation usually goes away quickly.
• Other ingredients, like niacin, may also cause itching sensations.

See More: Does Sweating Actually Help Burn Calories?

Understanding Pre-Workout Itching

Carriejune, founder of Minibeast, says:

"Some people experience tingling or itching after taking pre-workout. That's often due to beta-alanine, an amino acid that can trigger nerve endings in your skin. In most cases, this tingling naturally goes away within 30 minutes."

Ever taken a pre-workout and felt a strange tingling or itching sensation?

If so, you're not alone. This is actually quite common.

The culprit is usually beta-alanine, an ingredient commonly used in many pre-workout supplements. It's known to cause a tingling sensation, which in almost everybody is completely harmless.

Of course, beta-alanine isn't always the sole answer. Other ingredients may play a role. We'll cover those, explain why beta-alanine might make you feel tingly or itchy, and explain why it's included in pre-workouts.

The Basics of Pre-Workout

Pre-workout is one of the most popular workout supplements out there. Unlike some supplements, pre-workout is usually comprised of multiple different ingredients. These are sometimes called "multi-ingredient pre-workout supplements."

Potential Benefits of Pre-Workout

People usually take pre-workout for exercise performance.

Pre-workout is thought to support and even improve performance in a few different ways.

First is energy. Many people take pre-workout to provide an energy boost and reduce fatigue. That boost often comes from a stimulant, like caffeine.

Second is mental focus. Many people find that pre-workout helps enhance their alertness and mental clarity, which can be really helpful during high-intensity exercise.

Third is recovery. Pre-workout is generally tailored to support the workout itself (you can also physically support your workout with a waist trainer). But certain ingredients in high-quality pre-workout formulas may also support your body's recovery process, too.

Fourth is building muscle. By supporting athletic performance and potentially recovery, pre-workout is thought to support muscle growth.

Sounds great, right? Well, that's why pre-workout is so popular. But it doesn't explain why so many pre-workout supplements make people feel tingly or itchy.

Bonus: Does Creatine Help You Lose Weight?

The Beta-Alanine Itch

That tingling or itching sensation is usually caused by beta-alanine.

Beta-alanine is an amino acid. Our bodies use it to produce carnosine, which supports muscle endurance and performance.

Some people take beta-alanine supplements for this reason. Research suggests that a dose of 3.2-6.4 grams is effective.

Tingling or Itching

Beta-alanine causes that tingling or itching sensation because it stimulates nerve endings in the skin. It binds to a specific receptor, which then sends a signal to the brain. The brain interprets that signal as a sensation like itching, tingling, or pins and needles.

This sensation usually kicks in about 15 to 30 minutes after you take beta-alanine, or a pre-workout containing beta-alanine. It then typically lasts about the same amount of time.

Different people experience this sensation in different ways. Some don't feel it at all. It really depends on your individual sensitivity.

Allergic Reaction

To be clear, this sensation is not necessarily an allergic reaction. The International Society of Sports Nutrition considers beta-alanine to be safe.

Allergic reactions to beta-alanine are extremely rare. Typically, they would result in other symptoms, like hives or difficulty breathing. If that's the case, or you're unsure, you should check with a medical professional, preferably before taking any beta-alanine.

What You Can Do About the Itch

Many people find it easy enough to ignore the tingling or itching, and it usually goes away fairly quickly. But if you really can't stand it, there are techniques some people say might help.

The dose of beta-alanine might impact the intensity of the itching sensation. Taking smaller doses or splitting your dose into smaller portions may reduce or avoid the tingling altogether. Similarly, sustained-release formulations of beta-alanine might also result in less itching or tingling.

Some people find hydration helpful for reducing the intensity of the itching.

Why Include Beta-Alanine, Anyway?

You might be wondering why so many high-quality pre-workout formulas include beta-alanine. As we mentioned, it's believed to support muscle performance and endurance.

That's backed by scientific evidence. For example, one 2024 study gave participants beta-alanine supplements for four weeks. At the end of the supplementation program, the participants demonstrated improvements in their jumping power and height.

What Else Might Contribute to the Itch

Beta-alanine is a common culprit of itching from pre-workout supplements, but it's not the only possibility.

Another potential culprit is niacin, also called vitamin B3. It's useful for a lot of things, including energy production. But in high doses, it can cause vasodilation, which in turn may lead to skin flushing and itching.

Caffeine might also contribute to your awareness of any potential itching sensations.

Where to Get High-Quality Pre-Workout Supplements

For the millions of people using pre-workout, the many potential benefits outweigh the potential discomfort from a little tingling.

If that's you, then you might love Minibeast's Game Over. It's a max-strength, high-stim pre-workout designed to hit hard and not let up to help you push through to that final rep. The blend includes beta-alanine and other potent ingredients, like caffeine, L-Citrulline, creatine monohydrate, and more.

If you don't need quite so many stimulants, try a low-stim pre-workout like MB Mode. It contains enough caffeine for a steady lift, beta-alanine to help delay muscle fatigue, and other ingredients like citrulline malate to enhance blood flow.

And if you prefer working out at night and want a pre-workout with no stimulants at all, try a zero-stim pre-workout like MB Pump. It delivers laser focus and an insane pump, but without any stimulants that might disrupt your sleep after an evening workout. It also contains a patented form of beta-alanine.

Conclusion

Some people experience a tingling or itching sensation after taking pre-workout. That's usually due to beta-alanine, which stimulates nerve endings in your skin. Beta-alanine is generally considered safe and is often taken to delay muscle fatigue and support performance.

Frequently Asked Questions

Why Do Pre-Workouts Make You Itch?

Pre-workout formulas often contain ingredients that can cause itching or tingling sensations. For example, beta-alanine interacts with nerve endings in your skin.

Is Tingling From Beta-Alanine Bad?

For the vast majority of people, the tingling from beta-alanine is generally recognized to be harmless. It's simply the beta-alanine triggering nerve endings in your skin.

What Does Beta-Alanine Do to Your Body?

Your body uses beta-alanine to produce carnosine. In turn, your muscles use carnosine for endurance and to reduce fatigue.

Keep Reading: How Long Does Pre-Workout Last? What the Science Says

--

Minibeast believes that everyone has the power to evolve into their best self. From state-of-the-art fitness equipment to comprehensive training programs, our brand is built for those who take their goals seriously. Through The Heart of Minibeast, 5% of every order helps feed families in need and support community programs. Get the latest workout tips, product updates, and fitness content by following us on Instagram, Facebook, YouTube, and TikTok.

–

These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. The information provided on this website is for informational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider with any questions you may have regarding a medical condition or before starting any new diet, exercise program, supplement, or using any fitness equipment or apparel. By using this site and its products, you acknowledge that you do so at your own risk. Use all products only as directed and discontinue use immediately if discomfort or adverse effects occur.