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Nutrition

$9.00
Created to supplement additional electrolyte replacement needs, GU Roctane Electrolyte Capsules provide added electrolyte support on top of our hydration-drink products. Each bottle includes 50 capsules that are packed with electrolytes (sodium, magnesium, chloride) to aid in hydration by maintaining water balance and plasma volume. Vitamin D is important for calcium absorption and bone health. Vitamin B6 and ginger root may help to combat nausea. Take GU Roctane Electrolyte Capsules before, during, or after exercise to replenish electrolyte levels from any energy-demanding activity resulting in sweat loss.
$54.95
GOODBYE ACHY JOINTS & MUSCLES HALO accelerates joint recovery, reduces exercise-induced inflammation, and reduces downtime following overuse injuries. HALO provides comfort to muscles and joints that are sore and aching so you can train harder and recover faster. - Increases joint health & comfort* - Reduces inflammation & soreness* - Accelerates joint & muscle repair* *exercise-induced or following-exercise US PROVISIONAL PATENT #63229703 SO EFFECTIVE WE PATENTED IT Most everyone has heard of the benefits of curcumin, and plenty of athletes have tried it with little or no success. The main reason is because curcumin is very unstable. It spontaneously breaks down in the body before it gets where it needs to be to work. The technology that makes HALO special wasn’t available so we developed it. The key to realizing the benefits of curcumin is our proprietary Superba2® phospholipid delivery system that protects the curcumin from your body’s natural tendency to deactivate it, and allows it to be delivered and absorbed effectively. THE CUMULATION OF 18 YEARS OF RESEARCH WE CRACKED THE CODE Our proprietary delivery system not only protects the curcumin by keeping it stable in the body, it also allows it to be absorbed and delivered to where it works - inside cell membranes. The key to making curcumin effective is Superba2®, a special krill oil that protects curcumin from your body's natural tendency to deactivate it, and delivers both the curcumin and omega-3 phospholipids to cell membranes much more efficiently than fish/algal oils of any strength. Superba2® is uniquely compatible with cell membranes, so - even compared to other phospholipids - it reduces the process for membrane uptake from around 20 steps to 3-4 steps, getting curcumin and omega-3s where they need to be more efficiently, get fully absorbed, and produce anti-inflammatory effects. IMPROVES JOINT MOBILITY AND COMFORT REINFORCE THE WEAKEST LINK Joints and muscles bear the brunt of endurance training abuse. HALO’s Curcuminoids and Omega-3 phospholipids reduce late-onset soreness, exercise-induced inflammation, downtime following falls, and the impact of lingering minor injuries by signaling the musculoskeletal system to kickstart repair and adaptation processes, providing comfort to muscles and joints that are sore and aching from training or overuse. THE 95% PENALTY 95% of the population is deficient in omega-3s. That’s compounded by endurance exercise, impacting performance, mental processes, and recovery. Cardiovascular, cognitive, musculoskeletal—virtually no major body system is unaffected. Superba2™ omega-3 phospholipids are bioidentical to your cell membranes, so they don’t require additional processing steps for uptake. By improving membrane function, HALO supercharges endurance exercise capacity and energy production. DON’T LET ANYTHING SLOW YOU DOWN Almost every athlete has had training derailed by a nagging minor injury. That’s why we developed HALO, a proprietary combination of Curcuminoids, Astaxanthin, and Omega-3s that contributes to a full-body training foundation. More intense training, more effective recovery. FULL SYSTEM PROTECTION Omega-3s and curcuminoids efficiently populate cell membranes, where they are precursors and enhancers for signaling molecules that help maintain normal, healthy musculoskeletal tissue integrity and cardiovascular, cognitive, and immune functions. By managing inflammation-triggering enzymes and supporting cell membrane function throughout the body, HALO helps keep critical systems at peak efficiency to respond to your body’s need to perform. SOURCED FOR EFFICACY, PACKAGED FOR PROTECTION From the Superba2™ krill oil to the 95% pure curcuminoids from turmeric rhizomes, HALO’s effectiveness is rooted in its premium formula. Every component is sourced to maximize uptake and effectiveness, and the active ingredients are packaged in an amber glass bottle, which stabilizes and preserves notoriously vulnerable ingredients. A COMPREHENSIVE PERFORMANCE SYSTEM The overlapping, system-wide nature of HALO’s performance benefits aligns with First Endurance’s comprehensive approach to endurance athletics. Our line of supplements supports every aspect of endurance training rather than just supplying sugar and salt during exercise and protein during recovery. HALO, MultiV, and Optygen are the equivalent of building a base of fitness, ensuring your body’s infrastructure is equal to the exertions and stress of dedicated endurance training.
$57.27
ISOTONIC ENERGY GEL Liquid Shot is a cutting-edge, drinkable high-carb solution engineered for quick and convenient energy in a refreshingly light, isotonic formula. Each packet delivers 28g of carbohydrates and a clinically effective blend of all 5 essential electrolytes. - Contains fast-acting carbs for quick energy - Gets absorbed instantly without GI distress - Prevents cramping & improves hydration ENGINEERED FOR PERFORMANCE When you're falling apart, you don't have time to waste. Liquid Shot starts working almost immediately to give you gut-friendly energy, faster. TRADITIONAL GELS ARE HISTORY It's nothing like a traditional gel; this supercharged endurance fuel combines the latest research and technology to ensure peak performance, prevent cramping, and improve hydration. THE ULTIMATE LIFELINE Liquid Shots are isotonically balanced to match the concentration of cells in your body for quick digestion and absorption. This rapid assimilation ensures immediate effectiveness and spares you the typical 5-10 minute wait for it to take effect. ADDITION BY OMISSION In addition to omitting thickening agents, Liquid Shot also avoids common ingredients like fructose and vitamin C, which reduce efficient energy production (fructose) and have demonstrated a negative performance impact when consumed during endurance training and racing (vitamin C). TECH YOU CAN TASTE The latest research and technology give Liquid Shot a light, neutral flavor that’s easy to consume hour after hour, even when you're at your limit. PREVENTS CRAMPING & DEHYDRATION The revolutionary formula delivers all five electrolytes (instead of just one or two) for more effective uptake and cramp prevention. During extreme heat and intense efforts, Liquid Shot’s complete electrolyte profile can be the difference between peak performance and collapsing with cramps as the winning gap opens in front of you. THE BITTERSWEET TRUTH ABOUT FRUCTOSE Liquid Shot delivers a blend of high-efficiency carbohydrates without fructose. This combination effectively negates fructose’s ATP tax, boosting overall energy production without the problems of pure fructose. The biochemistry behind this is much more complicated, of course, and you can read more about how maltodextrin – and several other carbs – help Liquid Shot maximize fast energy.
$35.00
- Designed to maximize the effects of your workout and nurture your body - Accelerates glycogen restoration - Enables muscle repair - Helps body adapt to exercise and become stronger over time
$27.99 - $38.99
The same clean quality nutrition provided from standard Tailwind except with a caffeine kick! Caffeine is proven to significantly enhance high-intensity and endurance performance. All you need, all day. REALLY. Mixes with water to meet all your calorie, hydration, and electrolyte needs, without upsetting your stomach or making your taste buds revolt - Eliminates the need for gels, bars, chews, and pills, with this all natural drink mix - Cleans up easily using water and a quick rinse eliminating science experiments growing in your hydration vessels - Great for longer energy burning rides. In the case of shorter rides dilute solution further to taste - Gluten free, Vegan, and contains no soy or dairy
$39.99
The only recovery drink based on a patent-pending complete protein. - Replenishes glycogen stores by containing the right kinds and amounts of carbohydrates to restore your energy after a hard workout - Rebuilds muscles by providing perfectly complete protein based on a patent-pending mathematical model to rebuild damaged muscle tissue and mitochondrial protein - Rehydrates and restores electrolytes by providing sodium, potassium, calcium, and magnesium to restore electrolyte balance - Nothing repairs your muscles more efficiently, restores your energy faster, and makes you feel better sooner - Non-GMO, Gluten free, Vegan, and contains no soy or dairy
$49.95
- Use: Ideal for endurance training sessions - Increase the body's ability to adapt to high levels of physical stress - Increase VO2Max - Improves the body's ability to utilize oxygen more efficiently - Increase anaerobic threshold - Reduce lactic acid
$26.99
- Where home-style baking meets sports nutrition - Named "Best of" by Competitor magazine 3 years running (06-08') - Great taste and great texture - Gluten and Dairy free
$31.80
Skratch Labs Anytime Energy Bar is made with real ingredients such as fruits, nuts and quinoa. It has enough fuel to power you through endurance workouts and is tasty enough to be used as a snack any time of day.
$27.99 - $38.99
Caffeinated Tailwind meets all your calorie, hydration, and electrolyte needs just like you'd expect, plus it adds 35mg of caffeine per 100 calories. Caffeine is proven to significantly enhance high-intensity and endurance performance. - Caffeine boost when you need that extra kick - Complete calories, electrolytes, and hydration: Ditch the gels, chews, and pills, and go all day with just Tailwind. - No gut bombs: Stomach problems? You’ll love Tailwind. Unless you enjoy being doubled over, retching. - Tasty all day: Clean, light flavors taste better the longer you go. - Hydration pack love: Dissolves on contact and cleans up with a quick rinse. No film, aftertaste or science experiments! - All natural: Crystal clear with no dyes, preservatives or 4-syllable magical ingredients. USAGE Usage is similar to regular Tailwind except that we recommend limiting continuous use to 6 hours or less to avoid building up a high concentration. Each scoop contains 100 calories and 35mg of caffeine. For endurance workouts, mix 2-3 scoops per 24 oz of water per hour. Adjust to your personal calorie needs during training, using hunger as a guide. When it’s dialed in, you’ll feel satisfied and energetic, not hungry or full. On hot days, keep the same calories per hour, but increase water. To use in combo with other foods, reduce Tailwind intake by the calories you’re consuming elsewhere to avoid overloading the gut. For shorter workouts (<2hr), you can use less Tailwind to taste. Tailwind stick packs are perfect for fueling on the go. Just tear and pour into a water bottle for 200 calories of Tailwind goodness, no mess, no fuss.  ALL NATURAL AND ORGANIC INGREDIENTS Non-GMO Dextrose (Glucose), Non-GMO Sucrose, Citric Acid, Sodium Citrate, Sea Salt, Organic Flavor, Potassium Chloride, Magnesium Citrate, Calcium Carbonate, Organic Caffeine Gluten free/vegan/no soy/no dairy
$36.00
More Versatile Than Other Energy Gels Honey Stinger Caffeinated Energy Gels may be consumed straight from the packet before or during activity, spread on toast, stirred into tea, or anything else you can think of. All flavors mix well with water to make a natural energy drink. When to Consume Honey Stinger Gels are optimized for efficient fueling before and during athletic efforts. Gels provide instant, honey-powered energy that lasts, which delays muscle fatigue and gives your body the power to achieve your goals. Chocolate An energy gel formulated to satisfy that chocolate craving. Utilizing our organic gel formula and naturally caffeinated with Green Tea Extract, this gel has the great taste of a mouth-watering chocolate dessert. Certified Gluten-Free with organic tapioca syrup, organic honey, added electrolytes and natural chocolate flavor, this gel will keep you fueled for any athletic endeavor. Strawberry Kiwi Utilizing our organic gel formula and naturally caffeinated with Green Tea Extract, this gel boasts hints of both sweet and tangy. Certified Gluten-Free with organic tapioca syrup, organic honey, added electrolytes and natural strawberry and kiwi flavors, this gel will keep you fueled for any athletic endeavor. Ginsting Ginsting contains Siberian ginseng with an additional 32mg of caffeine from kola nut extract. The Ginsting Gel is Certified Gluten -Free, uses the same base ingredients as the Gold and boasts a richer, darker honey flavor derived from the kola nut. Ginsting Gel provides the benefits of caffeine and ginseng that many athletes are looking for.
$30.00 - $45.00
When you’re pushing yourself on the trail or road, you need an easy way to get both the hydration and energy you need to avoid bonking, stay energized, and keep competing. ROCTANE Energy Drink Mix is a carbohydrate intensive energy drink to help push the limits during ultra-distance and intense efforts. It contains the critical carbs and electrolyte replenishment that endurance athletes need to compete at high levels. - ROCTANE Energy Drink Mix is specifically formulated for the demands of long-duration and high-intensity activities. - Formulated with a blend of simple and complex carbohydrates, electrolytes, and BCAAs, ROCTANE Energy Drink Mix provides 250 calories per serving. - Carbohydrates (maltodextrin and fructose) that use non-competing pathways which can help maximize absorption, increase carbohydrate utilization, and diminish stomach distress, so you get energy that kicks in quickly and stays with you. - Sodium, the primary electrolyte lost in sweat that aids in hydration by maintaining fluid balance - Branched-chain amino acids (L-Leucine, L-Valine, and L-Isoleucine) which may reduce mental fatigue and decrease muscle damage while jump-starting recovery - Taurine can help maintain heart contractility and improve cardiac output during long exercise sessions
$2.95 - $55.00
Skratch Labs' Hyper Hydration Drink Mix is designed to over, or "hyper hydrate," you immediately before you put yourself in a grueling situation where you know you'll be sweating more than you can possibly drink. It is extremely high in sodium (more than an entire bag of potato chips), but because it has the same sodium concentration as your own blood, it maximizes the amount of water your vascular system can hold. It essentially turns your own body into an extra water bottle. Use Hyper Hydration to preemptively hydrate before events where you know you won't be able to drink enough or at all.
$59.95
A healthful blend of vitamins, minerals and electrolytes provides healthy hydration on-the-go. - Naturally flavored with fruit oils and powders, and a touch of stevia leaf extract - Vitamin A, B Folate, B6, C, E, and D for health and wellness - Sodium, potassium, calcium, magnesium, and chloride for optimal hydration - 12 tablets per tube - Dissolve in 16oz of water
$2.50 - $24.50
Skratch Labs Sport Energy Chews are made with simple ingredients and flavored with only real fruit to create an energy chew with a clean bite that isn’t coated in wax. The result is a subtle taste that lets you fuel your active lifestyle with a functional food.
$1.75 - $49.95
Our Sport Hydration Drink Mix was created for a simple purpose—to replace the electrolytes lost in sweat and to provide a little bit of energy when working out, without offending your palate or gut. We initially created this drink because some of the world's best athletes needed better. Conventional sports drinks made them sick. They were undrinkable—too sweet, over-flavored, and didn't even replace what was lost in sweat—which defeated the whole purpose, like fighting thirst with more thirst. The best athletes needed something to safely hydrate, something to quench their thirst, and something to help them perform better. So with their help, we reimagined sports drinks, stripping down what used to be a neon-colored carnival to its bare essentials. In the process, we learned that simple wasn't just better for elite athletes, it was better for everyone who works hard and sweats. The result is a sports drink with minimal sugar (4g per 100 ml) and a ratio of sugar (glucose + fructose) that is optimized for faster absorption, an electrolyte profile that actually matches what is lost in sweat (800 mg sodium, 80 mg potassium, 100 mg calcium, and 80 mg of magnesium per liter), and only real fruit for flavor for a light and refreshing taste that you can drink all day. That's it—less sugar, the right electrolyte profile, and real fruit. So, if you've never met a sports drink you wanted to take home, your luck is about to change. Drink when thirsty and leaking like a busted fire hydrant. Don't drink while deep in the middle of a Netflix marathon session or sending emails (unless, you're also on your trainer). Meaning, if you haven't earned it, you don't deserve it.
$1.50 - $48.00
Perform at your highest potential with GU Energy Gel. The 3:1 ratio of maltodextrin and fructose spares your limited glycogen stores with a combination of slow and fast-absorbing carbohydrates. The electrolytes sodium and potassium are just what your legs crave to stay firing properly. Branched-chain amino acids speed recovery and reduce muscle damage, and of course the delicious flavors go down easy.
$2.99 - $36.00
FASTCHEWS feature a scientifically-derived, proprietary high-performance formulation that provides a balanced supply of bioavailable sodium, potassium, magnesium, and calcium. Sodium is derived from sodium citrate, a proven source that has the added benefit of soothing the stomach. The formulation mirrors the electrolyte profile lost in sweat, in a form and quantity the body can absorb. Its non-GMO ingredients are all-natural, gluten-free, vegetarian, and without artificial sweeteners or colors. Rapid absorption takes place by mouth (buccal mucosa, and then the stomach). Ease of access is assured in a convenient moisture-resistant roll-wrapped format. This "Green" product generates little trash. - FASTCHEWS Help Reduce Muscle Cramping, Reduce Heat Stress, Boost Stamina, Maintain Electrolyte Levels - The ONLY chewable tablet that is formulated to closely resemble the electrolyte profile lost in sweat - Suggested use: 2 tablets per 15-30 minutes during activity - Fast absorption through buccal mucosa (tissue in mouth) - Each serving (2 tablets) contains: 100 mg sodium, 30 mg potassium, 10 mg calcium, 6 mg magnesium - Tart Orange and Zesty Lemon-Lime natural flavors encourage consumption - Bio-available active ingredients. Made in USA under cGMP (current Good Manufacturing Practice) - Ingredients are: non-GMO, gluten-free, vegetarian, fat-free - Natural stevia as sweetener. No color added - Also great for youth sports, travel rehydration, tennis and other sports, camping & hiking, effects of alcohol
$2.50 - $84.00
24-pack & Single Serving Created for demanding training and competition, GU Roctane Energy Gel stands out from original GU Energy Gel with more sodium, an electrolyte that aids in hydration, and even more branched-chain amino acids (leucine, valine, and isoleucine) that reduce mental fatigue and decrease muscle damage than our original GU Energy Gel. The amino acid taurine helps maintain heart contractility and improve cardiac output during long exercise sessions, while the amino acid beta-alanine helps promote formation of the intramuscular buffer carnosine. The 100-calorie packets contain carbohydrates (maltodextrin and fructose) that use non-competing pathways to help maximize carbohydrate absorption and utilization while diminishing stomach distress. 15-serving Introducing GU's new 15-Serving GU Roctane Energy Gel pouches. They’ve "bulked up" their proven Roctane Energy Gels into a larger serving size to give you, their athletes, more ways to fuel during your extreme efforts or long-duration activities. Loose trash and sticky pockets are hard to avoid when you’re out on the trail or road for hours and hours. That’s why they partnered with Hydrapak to create a custom 5-serving flask and nozzle designed specifically for GU energy gels. Their Flask makes it easy to carry the fuel you need while reducing trail-litter along the way. Less-mess, less-litter, more Roctane Energy Gel! Roctane Energy Gel is vegan, gluten free, and kosher.
$3.75 - $38.99
Think that you need gels, food and salt pills to race or train over 3 hours? Well, think again. :GO FAR has all the calories, electrolytes and protein you need to go all day long. :GO FAR > 3 hrs for women tastes great, even warm and will not sour in the heat. Remember, most everything tastes fine while sitting on the couch. The real test is how does it taste long into a workout and after it sits in the sun for 4 hours? If it is not drinkable, you will not get the calories and electrolytes needed to perform your best.
$2.50 - $37.50
Portable Recovery Snack This chocolate-coated protein bar doubles as a great-tasting meal replacement snack and after-workout recovery bar. The Protein Bar contains gluten-free ingredients and zero trans fats in combination with over 25% USDA Certified Organic honey, 10g of whey protein (20% RDA), 23 vitamins and minerals, calcium and antioxidants. Finally, A Great Tasting Protein Bar The Honey Stinger Protein Bar is the perfect bar for endurance training. It contains whey protein and 30% honey, making it the perfect way to restore glycogen levels after a long training day or post-race without upsetting your gut. A mix of sugars and protein is needed for both quick and long-lasting energy, and this bar does the trick. When to Consume Protein Bars contain the perfect amount of protein and carbs to refuel your body. The bar’s 30% honey provides a natural sweetness and helps stabilize your blood sugar to avoid a post-workout fog. Focusing on recovery helps your body build strength and allows you to perform your best, every time.
$0.97 - $30.00
Women and men require different nutrition, especially during and after exercise when physical stress is at a maximum. Clif’s Luna Bars are made specifically to meet the demands of women’s bodies. Extra calcium and Vitamin D provide the building blocks for healthy bone density, while soy protein nourishes and repairs tired muscles. 24 vitamins and minerals, including anemia-busting folic acid and iron, boost the immune system and cell function. Luna Bars are made from high quality, 70% organic ingredients and contain no hydrogenated oils or artificial flavors.
$34.95
MANA [ma-na] (n.) the power of the elemental forces of nature embodied in an object or person. To have mana is to have great authority, presence, or prestige. The Mana Superfood Bar provides on the go nutrition from some of the healthiest ingredients possible. Developed over 24 months, tested with countless athletes in triathlons, motocross, cycling, and in functional fitness, it is the perfect snack to energize your activity. Inspired by the wild harvests of the Bolivian rainforests and crafted from quality real foods, the Mana Bar is an incredible superfood bar that provides healthy fats while also being light and satisfying hunger. All the fuel and none of the weigh-down. Join the adventure! - 100% Non-GMO ingredients, Pea Protein Isolate, Organic Honey, Organic Peanut Butter, Organic Sugar, Organic Almond Butter, Flaxseeds, Chia Seeds, Quinoa, Gluten-Free Rolled Oats, and Himalayan Pink Salt - 190 calories per bar - 10g of high-quality plant protein - 6g of organic sugar - Gluten Free
$21.95
SaltStick Caps are full-spectrum electrolyte capsules that have been engineered to replace sodium, potassium, calcium, magnesium, and chloride lost in sweat, in a form and quantity that your body can use. The buffered salt composition also helps digestion and absorption, with a recommended dose of 1-2 capsules per hour. These unique capsules help minimize muscle cramping and heat stress during training and endurance events. Vitamin D has been added to aid in calcium absorption by the body. The capsules are vegetarian, gluten-free, GMO-free, and contain a balanced and buffered mixture of electrolytes with nothing unnecessary added. The formulation provides unparalleled support for challenging conditions, and have been used to help athletes win major endurance events worldwide.
$79.95
- Use: Ideal for repeated hard training sessions - Increase the body's ability to adapt to high levels of physical stress - Improves aerobic performance, power, strength and enhance VO2 Max - Delivers 1500mg of Beta-Alanine - Modulate cortisol - Premium grade Rhodiola & Cordyceps
$35.50
Skratch Labs Sport Recovery Drink Mix is designed to rapidly refuel, rehydrate, and rebuild you when you're completely empty after your longest and hardest workouts. With a 4-to-1 ratio of carbohydrate to protein, it brings your blood sugar up fast when you're totally spent, causing a spike of the hormone insulin, which facilitates getting the sugar, electrolytes, fat, and protein in Sport Recovery Drink Mix back into your depleted muscles fast. Basically, Sport Recovery Drink Mix is like chocolate milk, but without excess ingredients and with a more optimized macronutrient profile for restoring muscle glycogen (aka refueling). - Made with lactase so the lactose intolerant can digest the milk sugar and with the probiotic bacillus coagulans 30 to help soothe any exercise-induced gut distress. - Non-GMO, Kosher, vegetarian, and gluten free - Use after exercise to recover faster and be ready for tomorrow's workout. Add 2 scoops to 12 fl ounces of water and shake (don't stir) immediately after your toughest efforts.
$39.99
- The perfect meal replacement option for days on-the-go, or activities when you just can't (or don't want to) stop, this portable food is the perfect solution - Nutrient-dense calories that deliver lasting energy - Blended, not baked, with chunks of real fruits, nuts and seeds - for fantastic taste and texture - Responsibly sourced - 12 servings - USDA-certified organic - Gluten-Free - Kosher - Non-GMO - Vegan
$29.99
- Packed with nutrients to power you from morning workouts to race days, these organic energy chews help you step up your game right when you need it - Plant-based organic energy chews with electrolytes and B vitamins - Provide fast fuel-ups that last through the home stretch, and some flavors are caffeinated for that extra BOLT when you need it most
$20.00
Designed with efficient carbohydrates and optimized electrolytes to keep you moving. - Optimized Electrolytes Maintain Fluid Balance - Efficient Carbs Speed Up Hydration - Flavors Sourced From Organic Ingredients Breaking a Sweat For More Than 90 Minutes? Drink Nuun Endurance! When you work out longer than 90 minutes your body needs more than water and electrolytes to keep up. Nuun Endurance is the perfect blend of electrolytes and carbohydrates to keep you hydrated and go longer and stronger all dang day. How To Enjoy: - DROP: Add one scoop to 16 oz of water - STIR: Stir or shake to dissolve - DRINK: Sip to stay hydrated during long workouts
$30.00 - $54.00
Release the hounds with GU’s version of rocket fuel—Roctane Energy Drink. The proven combination of glucose and fructose is the most easily and rapidly absorbed form of carbohydrate. And, a high electrolyte content is just what your legs crave to fire properly, while 35mg of caffeine stokes your central nervous system, increasing the release of free fatty acids into your bloodstream, and further sparing your limited glycogen stores. Plus, taurine and beta-alanine improve muscle endurance throughout the grinding hours of a road race, marathon, or triathlon. Branched-chain amino acids speed recovery and reduce muscle damage, histidine buffers against acidic byproduct, and of course the delicious flavors go down easy.