What Every Gym-Goer Should Know About Pre-Workout Supplements

Experts weigh in on the potential benefits and downsides of popular workout supplements.

Contents

What Are Pre-Workouts?What’s in the Scoop?What’s Really in the Scoop? (And Why It’s Hard to Know)What Are the Potential Benefits?What the Pre-Workout Labels Don’t Tell You The Real Foundation to Performance

At 6 p.m., caffeine is king.

Across the country, gym-goers scoop powder into shaker bottles, chasing a last burst of energy to fuel evening workouts. Pre-workout supplements, called “pre-workouts,” promise a better workout through energy-enhancing ingredients.

Once the domain of bodybuilders, pre-workouts have gone mainstream, driven by social media, flashy marketing, and late-night training trends. Nearly 80 percent of regular gym-goers now use them, according to industry data.

As casual lifters join elite athletes in using pre-workout supplements, a more complicated picture emerges. The gains may be real, but are they worth the trade-offs?

What Are Pre-Workouts?

Amid neon tubs boasting “Explosive Energy,” “Insane Focus,” and “Pump Booster,” it’s not always clear what pre-workouts actually are.

Pre-workouts are powdered supplements mixed with water and taken before exercise. They offer a jolt of energy, sharper focus, and more stamina—a caffeinated cocktail for the fitness crowd.

“It is often recommended to ingest the supplement 30–60 minutes before exercise with the goal of improving the quality of your workout—i.e., increased energy, focus, delayed sensations of fatigue, [and] improvements in muscular endurance or strength,” Andrew Jagim, a sports medicine researcher at Mayo Clinic Health System, told The Epoch Times.

With consistent use and structured training, he noted, pre-workouts may contribute to greater gains in strength and muscle mass compared to training alone.

While pre-workouts may enhance energy and endurance, they aren’t a magic bullet.

“Pre-workout is not a shortcut to success,” Dr. Gabrielle Lyon, a physician specializing in muscle-centric medicine, told The Epoch Times. “It’s not a replacement for sleep. It’s not a stand-in for strategic nutrition or consistent training. If your baseline isn’t solid, no supplement will carry you through.”

What’s in the Scoop?

Most pre-workouts pack a mix of performance-boosting ingredients—often with 15 or more per tub. Caffeine leads, providing energy. Beta-alanine delays fatigue. Creatine boosts strength and power. Vasodilators like citrulline and nitrate improve blood flow and fuel the post-lift “pump.” Some formulas add vitamins like B-complex or C. Others include nootropics—compounds believed to enhance mental function—like tyrosine or alpha-GPC, aimed at sharpening focus and improving mood.

However, there’s no standard formula, leaving consumers guessing amid a sea of options. The most common ingredients include:

Caffeine—Well-studied and effective: Caffeine is the most studied and most reliable pre-workout ingredient. According to the International Society of Sports Nutrition, it can offer small to moderate boosts in everything from endurance and strength to sprinting and jumping.

Creatine—Proven but often underdosed: Backed by decades of research, creatine monohydrate improves strength, power, and muscle mass at daily doses of 3 to 5 grams. However, many pre-workouts include too little to be effective.

Beta-alanine, citrulline, and nootropics—Mixed evidence: Some ingredients show promise but require consistent use. Beta-alanine and citrulline may boost endurance and blood flow, but effects build gradually, not from one scoop. Nootropics like tyrosine and theanine may aid focus, though research on how they interact with stimulants is still young.

Food dyes and natural flavors—Many pre-workouts use artificial sweeteners, food dyes, and vaguely identified flavorings. Though these ingredients enhance taste and shelf appeal, their long-term health effects are unclear.

“While the data on artificial sweeteners like sucralose is mixed, long-term overexposure may affect gut health, insulin sensitivity, or cravings,” said Lyon. She added that frequent use of synthetic colors and flavors “could contribute to low-grade inflammation or microbiome disruption.” Her advice: Choose cleaner, whole-food-based formulations.

What’s Really in the Scoop? (And Why It’s Hard to Know)

What’s in your scoop depends on the brand, and sometimes, you don’t really know. Some products deliver clinically backed doses, while others offer little more than flavored caffeine.

“I recommend selecting products with an open, transparent label,” said Jagim. “A lot of products tend to either be under-dosed or include ingredients in a proprietary blend, making it challenging to know if there is enough of the key ingredients.”

A 2019 study in Nutrients found nearly half of top-selling pre-workouts relied on proprietary blends that hid ingredient amounts. Even when listed, many fell short of effective doses. Beta-alanine averaged just 2 grams—half the recommended amount. Creatine and citrulline were also frequently underdosed, reducing their benefits within the mix.

Pre-workout supplements fall into a regulatory gray zone. In the United States, they are classified as dietary supplements, not drugs, and are not subject to U.S. Food and Drug Administration approval before they hit store shelves. Manufacturers are responsible for safety and accurate labeling, but enforcement is largely reactive. The FDA typically steps in only after reports of harm. While companies must notify the FDA when introducing new ingredients, safety data is rarely made public.

Consumers face a crowded and confusing market. Many formulas blend stimulants, amino acids, and nootropics, but research primarily focuses on single ingredients like caffeine or creatine. The combined effects, especially when stacked with other supplements, are still poorly understood.

“The lack of long-term safety data is of concern,” said Jagim. Regular use, he noted, may pose cardiovascular or cognitive risks that remain understudied.

A 2021 review in Strength and Conditioning Journal analyzed 22 trials on multi-ingredient pre-workout supplements (MIPS). Some showed modest gains—such as for lower body strength (repetitions) and upper body power—most results were inconclusive. Nearly all studies were rated “low quality” due to small sample sizes, bias, and poor transparency.

Despite their popularity, the science behind pre-workout supplements remains unsettled. Few clinical trials are registered in advance—a key step in research transparency—and even fewer report side effects. The wide variation in formulas makes it difficult to determine which ingredients are truly effective or potentially harmful. The review noted: “Optimal forms and strategies on MIPS consumption and use has not yet been rigorously examined.”

Still, not every product keeps consumers in the dark. Some brands offer fully transparent labels, listing exact ingredient amounts and avoiding proprietary blends altogether. Often third-party tested, these formulas aim to give users more control and confidence in what they’re taking.

What Are the Potential Benefits?

For many, the appeal of pre-workouts is simple: more reps, more energy, sharper focus. And in some cases, the promise holds up.

“The clearest benefits are improvements in muscular endurance, meaning the ability to perform as many reps as possible before failure,” said Jagim. “Additionally, some of the more consistent benefits are cognitive, with people frequently reporting improvements in mood, focus, energy, and alertness.”

That mental boost can be crucial when motivation dips at the end of a long day. Caffeine and nootropics may sharpen focus and are one reason pre-workouts have become a late-night gym staple.

Physical gains depend on effort. Regular, high-level training brings the most benefit, said Jagim. “If someone doesn’t consistently push themselves to near maximal levels, the supplement and key ingredients may not exert as strong of effects.”

Some studies support short-term benefits. In a 2024 trial published in Frontiers in Nutrition, 20 resistance-trained men and women took either a pre-workout or a placebo an hour before testing. Those using the supplement did more reps, produced more power, and found the workout felt easier—after just one dose. The study was funded by SHIFTED, the product’s manufacturer.

Not all users see the same effects. Some ingredients like beta-alanine and creatine need consistent use to show results. Others, such as caffeine, act quickly but vary widely in impact depending on dose and personal tolerance.

For most gym-goers, results can range from noticeable to negligible. Ultimately, the boost may depend less on the scoop and more on the effort.

What the Pre-Workout Labels Don’t Tell You

Pre-workouts can boost focus, stamina, and output—but not without risks.

Chief among them is caffeine. Many brands contain 200 to 400 milligrams per serving, equal to two to four cups of coffee. While the FDA considers this safe for most healthy adults, sensitivity varies. Side effects include anxiety, rapid heart rate, and high blood pressure. Add additional cups of coffee or energy drinks to the mix, and a person’s total intake can exceed safe limits.

“Caffeine has an average half-life of about five hours,” said Lyon. “Poor sleep is one of the fastest ways to sabotage your training progress, so it’s important to consider timing and dosage if you’re using caffeine-based supplements.”

Behavior matters, too. Dry scooping—taking powder straight without water—has gone viral on social media. It can lead to choking, faster caffeine absorption, and, in rare cases, serious cardiac events.

In 2024, a healthy 25-year-old man suffered a heart attack after dry scooping pre-workout. Doctors found a blocked artery and linked it to intense exercise and undiluted stimulants. He survived, but the case sparked warnings about misuse.

Habitual use is common. “Caffeine itself can be addictive,” said Jagim. As tolerance builds, some users double their dose to recapture the initial effect. The behavior can also become psychological. “Any ritualistic behavior,” he added, “can become habit-forming.”

The Real Foundation to Performance

Flashy labels aside, most gym-goers don’t need pre-workouts. “An average gym-goer could probably receive the same degree of benefits from something as simple as a coffee,” said Jagim. For many, that caffeine boost comes cheaper and with fewer unknowns.

Lyon agrees. “For most active adults, pre-workouts aren’t essential,” she said. “If you’re prioritizing muscle health with high-quality protein, nutrient-dense meals, hydration, and recovery, your body already has what it needs to perform.”

Experts emphasize the basics: sleep, nutrition, hydration, and consistent effort. “If you give 50 percent effort in the gym,” said Jagim, “adding a supplement to your daily routine isn’t going to do much and is likely a waste of money.”

Caution is key for those who use pre-workouts. Choose third-party tested products certified by groups like NSF International to ensure accurate labels and clean ingredients.

Some prefer a pick-me-up without pre-workout. “Coffee or green tea can offer mild stimulation without the overload,” said Lyon. “I also like adaptogens like rhodiola or ginseng, which can support endurance and focus without the crash.” Non-stimulants like beetroot, citrulline, or beta-alanine may also boost blood flow and reduce fatigue.

Some users use amino acid supplements like BCAAs (branched-chain amino acids) or EAAs (essential amino acids). While these won’t deliver the immediate jolt of a typical pre-workout, they may help reduce fatigue and support endurance, especially in fasted workouts or low-carb training. Their real strength lies in recovery and muscle repair, not stimulation.

Don’t stack pre-workouts with other stimulants, and always follow dosing, especially if caffeine makes you jittery. Skip them altogether if you’re under 18 or managing a medical condition, and always consult a doctor first.

Training later in the day? A stimulant-free version may be the better choice. “Caffeine after 2 p.m.,” Jagim said, “may disrupt sleep and delay sleep onset,” which can undermine recovery and performance.

In the end, the best pre-workout might not come in a tub. It could be a banana, a sandwich, or just the right playlist. “Don’t underestimate the power of a good warm-up and playlist—mental cues matter,” said Lyon. No powder replaces effort. And no scoop substitutes showing up.

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