Best Supplements to Improve Muscle Strength & Endurance in 2025

The sports nutrition landscape has evolved dramatically over the years, yet a few pillars remain essential for anyone looking to enhance performance and recovery. Whether your focus is on high-intensity strength sessions or extended endurance workouts, supplements can provide a valuable edge when combined with quality nutrition and training. In 2025, we continue to rely on tried-and-true ingredients such as protein, caffeine, branched-chain amino acids, beta-alanine, citrulline malate, and glutamine, while also embracing creatine and adaptogens. Below, you will learn how each of these supplements supports muscle strength, endurance, and overall performance. You will also discover why a balanced lifestyle remains the key to making the most of these products.

8 Best supplements to improve strength and endurance in 2025

Protein and Why It Still Matters

Protein has long been known as the cornerstone of muscle growth, a role that extends far beyond simply bulking up. By supporting the repair of broken-down muscle fibers and promoting new tissue development, protein intake directly influences both strength and endurance. In 2025, many athletes are exploring novel sources of protein, including plant-based options like pea or hemp. These newer approaches reflect a growing movement toward sustainability and may appeal to individuals seeking greener or allergen-friendly solutions. Regardless of the specific protein source you choose, the underlying objective remains the same: maintaining adequate protein levels in order to allow your body to recover and adapt effectively between training sessions.

Creatine for Enhanced Strength

Creatine is widely regarded as one of the most researched supplements on the market. Its primary role involves replenishing ATP, the energy currency your muscles rely on for short bursts of power. This explains why creatine is particularly helpful in improving performance during explosive movements, such as heavy lifting or sprinting. In 2025, many are experimenting with a variety of creatine forms, including creatine hydrochloride and buffered creatine, which may reduce some of the bloating and water retention traditionally associated with the more common monohydrate form. While opinions vary regarding loading phases and daily maintenance doses, most protocols recommend supplementing creatine consistently in order to maintain elevated muscle stores and support gains in both strength and size.

Beta-Alanine to Delay Fatigue

Beta-alanine has garnered considerable attention among those who engage in high-volume or endurance-based training. By elevating the level of carnosine in your muscles, beta-alanine can help delay the accumulation of lactic acid, thereby decreasing the burning sensation that typically signals the end of a set. This mechanism enables you to maintain your pace for a bit longer and perform additional repetitions during each workout, ultimately improving muscular endurance. Thankfully, it is easy to get your daily dose of beta-alanine since it’s an important pre-workout ingredient – all you need to do is get the right product. Additionally, you can get it from many popular foods, like:

• chicken,
• beef,
• pork,
• turkey,
• fish,
• lamb.

Citrulline Malate for Better Performance

Citrulline malate is another staple supplement that has proven advantages for those who train at both high intensity and over extended durations. Research suggests that the combination of citrulline and malic acid can increase ATP production and delay the onset of fatigue, potentially resulting in more productive workout sessions. The effect on blood flow and nutrient delivery can be especially beneficial for anyone seeking an extra edge in everything from traditional weightlifting to sustained cardio activities. While this compound can be found as a standalone product like Citrulline it appears more frequently in combination with other ergogenic aids, particularly in all-in-one pre-workout formulas designed to support endurance, strength, and power.

Caffeine for Energy and Focus

Caffeine has maintained its popularity, and for good reason: it reliably boosts alertness, motivation, and energy. The challenge remains incorporating caffeine in a manner that aligns with your training schedule. While fast-acting caffeine gives you a pronounced jolt, some prefer newer extended-release options that provide a smoother energy profile, especially during workouts that last more than an hour or involve both strength and endurance components. Where to get your caffeine from?

• Coffee,
• tea,
• energy drinks,
• stimulating pre-workouts,
• fat burners.

In 2025, the sheer variety of caffeine-based supplements means you should pay attention to your total intake to avoid overstimulation. Timing is also crucial because caffeine stays in your system for hours and can interfere with sleep if consumed too late in the day.

Branched-Chain Amino Acids and EAAs for Recovery

Branched-chain amino acids have long been recognized for their role in initiating muscle protein synthesis, a process that is essential for both muscle building and recovery. In addition to BCAAs, many athletes now consider complete essential amino acid supplements, known as EAAs, to be equally or even more effective in facilitating muscle repair. The right mix of amino acids can help your body bounce back from intense sessions, reduce muscle soreness, and promote tissue growth, thereby improving your capacity to maintain consistent training volume. These supplements often overlap with other formulations, appearing in both pre-workouts and intra-workouts for those who desire ongoing support during their exercise routines. Where can you find BCAAs? In many foods and supplements, including:

• Corn,
• whey,
• milk,
• soy,
• beef,
• chicken,
• fish,
• almonds,
• pre-workouts.

Like in the case of coffee, you should pay attention to your BCAA intake. What if you need to choose between them and, let’s say, a pre-workout with additional ingredients? In such scenarios, it all depends on the purpose of your training – BCAAs are the best supplement for muscle endurance, while pre-workouts will do the trick if you prefer strength training. You can learn more about this in our article on pre-workout vs. BCAA.

Glutamine for Muscle and Immune Support

Glutamine is recognized not only for its role in muscle tissue repair but also for its influence on immune function. Individuals who train at high intensity or with significant volume may find that glutamine helps preserve muscle and reduce the likelihood of feeling run-down. Studies from previous decades have shown that athletes taking glutamine experienced fewer immune-related issues after exhaustive training compared to those on placebo. While glutamine remains prevalent in many diets due to its presence in foods like seafood, dairy, and certain vegetables, supplementing can be a convenient choice for those with heightened training demands or compromised nutrient intake. Where to find glutamine? In foods such as:

• seafood,
• red cabbage,
• dairy,
• eggs
• nuts.

Adaptogens and Their Growing Popularity

Adaptogens, including ashwagandha, cordyceps, and rhodiola, have gained traction among athletes for their potential to modulate stress responses, improve energy levels, and bolster overall resilience. In 2025, these ingredients frequently appear in broader pre-workout and recovery formulations. Ashwagandha is reputed for reducing cortisol, while cordyceps may aid in oxygen utilization, and rhodiola is often linked to improvements in endurance and mental focus. By helping the body adapt to physical and psychological stress, adaptogens can complement more traditional supplements that focus on muscle synthesis, energy production, and nutrient delivery.

Even the Best Supplements for Endurance and Strength Won’t Match a Healthy Lifestyle

Even the best supplements for muscle strength and endurance cannot outperform a solid foundation of balanced nutrition, adequate sleep, and well-planned training. A supportive lifestyle includes consistent hydration, regular stretching or mobility work, and time dedicated to recovery. In 2025, technological tools and wearable devices offer detailed insights into sleep patterns, heart rate variability, and training metrics. While these advancements can be helpful in tailoring a personal fitness journey, success ultimately depends on adhering to consistent exercise routines and healthy habits. Supplements should be regarded as synergistic aids rather than substitutes for a robust and methodical approach to training.

Best Supplements to Improve Muscle Strength & Endurance in 2025 - The Takeaway

Whether you are a seasoned athlete or new to the gym, selecting the right supplements can have a noticeable impact on your results, particularly when it comes to improving muscle strength and endurance. Protein, creatine, beta-alanine, citrulline malate, caffeine, branched-chain amino acids, glutamine, and adaptogens the best supplements to improve muscle strength and endurance in 2025. You might also read: Best Supplements & Ingredients for Muscle Pump Sources: Bendahan, D., Mattei, J. P., Ghattas, B., et al. (2002). Citrulline/malate promotes aerobic energy production in human exercising muscle. British Journal of Sports Medicine, 36, 282-289. Castell, L. M., Poortmans, J. R., & Newsholme, E. A. (1996). Does glutamine have a role in reducing infections in athletes?. European journal of applied physiology and occupational physiology, 73(5), 488–490. https://doi.org/10.1007/BF00334429