Science-Backed Hydration For Endurance Athletes
We're Built On Science - Not Hype.
HYK isn't built on marketing fluff - it's built on science. Our formulas are built on proven sports nutrition principles — not filler ingredients or marketing gimmicks. Each component serves a purpose: to help your body perform, hydrate, and recover more efficiently.
Our blends are crafted using clinically studied ingredients, balanced electrolyte ratios, and precise nutrient combinations that support energy, focus, hydration, and recovery — the four pillars of endurance performance.
We don’t overload doses or chase trends. We build products that work — backed by science and trusted by endurance athletes everywhere.
HYK Original Endurance Formula | "The Bonk Buster"
The All-In-One Endurance Mix trusted by athletes who go the distance.
HYK Original is the ultimate formula and deemed a "game-changer" for sustained performance. With a powerful combination of clean energy, sharp focus, balanced hydration, and superior recovery support — it’s built to fuel long efforts, hard climbs, and the moments that separate finishers from the rest.
If you want to seperate yourself from the pack, then this is for you.
Hydration
Each serving delivers 1,000mg of sodium from pure sea salt, 500mg of potassium, and 60mg of magnesium — the key electrolytes your body loses most during endurance efforts. Sea salt also provides valuable trace minerals that support fluid balance and nerve function, giving your body what it actually needs to sustain peak output.
Most sports drinks use low sodium or cheap table salt. HYK uses pure sea salt for cleaner mineral absorption. Our 1,000mg sodium dose mirrors what elite endurance athletes typically lose in an hour of sweat, ensuring your hydration levels stay where they need to be — even in extreme conditions.
Sustained Energy (without the jitters)
Caffeine from green tea (120mg) provides clean, sustained energy. Combined with 200mg of L-Theanine, it delivers smooth alertness without the crash or jitters. The pairing of these two compounds is scientifically shown to enhance focus, endurance, and reaction time during prolonged exertion.
We use natural caffeine from tea leaves for steady energy that lasts. Our 120mg dose keeps you alert while the Theanine smooths the energy curve — keeping you locked in mile after mile without overstimulation.
Focus & Mental Sharpness
Alpha GPC (200mg) and L-Tyrosine (400mg) are powerful natural nootropics that support cognitive clarity, reaction time, and motivation under fatigue. These compounds help maintain sharp mental performance even when your body is taxed — perfect for long-distance athletes who need to stay dialed in.
We chose these dosages because they hit the sweet spot for endurance athletes — strong enough to improve focus, but clean and natural so your performance stays balanced and clear-headed.
Recovery
BCAAs (2:1:1 ratio) and Beta-Alanine (1.2g) help reduce muscle breakdown and delay fatigue, while Glutamine (1g) supports muscle repair and immune health. These compounds help your body bounce back faster and recover stronger.
We use clinically aligned doses of each — 2g leucine, 1g isoleucine, 1g valine — the optimal ratio for endurance recovery. Paired with Beta-Alanine’s lactic acid buffering power, this combination supports faster turnaround between sessions and less perceived fatigue so you can go farther and harder.
HYK Essential Electrolytes | "The Base Layer"
Everyday hydration meets performance-level science.
HYK Essentials is designed for hydration made smarter — a perfectly balanced electrolyte mix enhanced by our Advanced Absorption Formula for faster, cleaner hydration you can feel. It’s the go-to formula for daily use or long sessions where hydration is everything.
Hydration
HYK Essentials provides 400mg of sodium from sea salt, 150mg of potassium, and 60mg of magnesium — a proven balance to replace electrolytes lost through sweat and maintain muscle and nerve function. Sea salt adds trace minerals that further optimize hydration.
These precise ratios mirror what the body loses during one hour of training. Instead of using generic salt, HYK’s use of sea salt ensures better absorption and more natural mineral replenishment without bloating.
Advanced Absorption Formula
Our Advanced Absorption Formula blends 6mg zinc, 15mg vitamin D, and 75mg vitamin C — nutrients proven to improve electrolyte uptake and retention. These compounds support immune health and help your body stay balanced even under heat or stress.
HYK Essentials doesn’t just hydrate — it optimizes absorption. This trio helps your body take in the electrolytes faster and more efficiently, making each sip count toward real hydration.
Recovery
Proper hydration is the cornerstone of recovery. Our electrolyte balance helps reduce cramping, muscle soreness, and fatigue — restoring performance faster after long or intense activity.
HYK Essentials’ ratio of 400mg sodium, 150mg potassium, and 60mg magnesium is fine-tuned for rehydration post-effort, helping your body reset and repair more efficiently than generic electrolyte mixes.
The HYK Standard
HYK’s ingredient selection is based on established sports science and clinical research in hydration, endurance performance, and cognitive support.
Science-Backed
Every ingredient has a purpose and is dosed to perform.
Full Transparency
No hidden fillers, sweeteners, or colors — ever.
Trusted By Athletes
Used and trusted by endurance athletes who demand performance.
Further Reading
HYK’s formulations are inspired by decades of research on hydration, performance, and recovery. Here are a few of the key studies and organizations that shaped our understanding of endurance nutrition and electrolyte balance
- American College of Sports Medicine. Exercise and Fluid Replacement. Medicine & Science in Sports & Exercise, 2007. A foundational position paper on proper hydration strategies and sodium requirements during exercise.
- Sawka MN, et al. Human water needs. Nutrition Reviews, 2005. Discusses how electrolyte concentrations affect fluid retention and performance under heat stress.
- Maughan RJ & Shirreffs SM. Development of hydration strategies to optimize performance for athletes in high-intensity sports. Scandinavian Journal of Medicine & Science in Sports, 2010.
- Haskell CF et al. The effects of caffeine on cognition, mood, and performance. Psychopharmacology, 2005. Examines how caffeine improves mental and physical performance.
- Owen GN et al. The combined effects of L-theanine and caffeine on cognitive performance and mood. Nutritional Neuroscience, 2008.
- Peake JM et al. Recovery after exercise: oxidative stress, inflammation and antioxidant supplementation. Journal of Sports Medicine, 2017. Explores how micronutrients and hydration impact muscle recovery.
- Magnesium and potassium roles in muscle performance — National Institutes of Health, Office of Dietary Supplements.
HYK is committed to using science-backed ingredients and research to support endurance athletes. The following organizations and publications are respected sources for sports performance and hydration science:
- American College of Sports Medicine (ACSM) – leading authority on exercise science and sports nutrition
- National Institutes of Health (NIH) – peer-reviewed studies on hydration, electrolytes, and nutrient absorption
- Journal of the International Society of Sports Nutrition (JISSN) – research on supplementation and endurance performance
- U.S. Food & Drug Administration (FDA) – guidance on dietary supplement safety and labeling
- World Anti-Doping Agency (WADA) – information on approved and prohibited substances for athletes
These organizations are provided as educational references only. HYK is not affiliated with or endorsed by any of the above institutions.
The information presented on this page is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. HYK products are formulated based on current sports nutrition research and are designed to support hydration and performance. Individual results may vary. Always consult a qualified healthcare professional before making changes to your diet, supplement, or exercise routine.
