EVERYTHING YOU
NEED TO KNOW.

HYK is Performance Hydration built for athletes who demand more from their hydration. We believe hydration should be more than simply replacing fluids and electrolytes.

HYK is built around four performance pillars: Hydration, Energy, Focus, and Recovery. Our two formulas are designed to give you the right level of support for the demands of the day — from everyday hydration and electrolyte replenishment to long, demanding training and racing.

Built for the extra mile™.

Think of them as two different tools within one hydration system.

Essentials is about getting the fundamentals right. Endurance Formula adds performance support when the effort demands more.

Yes. HYK Endurance Formula was specifically designed around the demands of longer endurance efforts, including ultrarunning, trail racing, long training sessions, and race-day efforts.

It combines 800mg of sodium, 450mg of potassium, and 60mg of magnesium with 100mg of caffeine, a focus system featuring L-theanine, L-tyrosine, and Alpha-GPC, plus 1g of taurine.

For very long events, Endurance Formula should be used as part of a complete hydration and fueling strategy rather than as a replacement for adequate food or carbohydrate intake.

It depends on the formula and the demands of the effort.

Before exercise: HYK can help you begin your workout or race with a hydration strategy already in place.

During exercise: HYK can help you replenish electrolytes and fluids as you sweat. Endurance Formula is specifically designed for demanding efforts where you also want energy and focus support.

After exercise: HYK can be incorporated into your post-training hydration routine to help replenish electrolytes lost during activity.

Your individual needs will depend on the duration and intensity of exercise, environmental conditions, sweat rate, and personal tolerance.

HYK formulas are made without artificial colors or unnecessary fillers.

HYK is also made without artificial sweeteners. The formulas use carefully selected functional ingredients and natural flavoring and sweetening components to create a clean, purposeful formulation.

Every ingredient has a reason for being there. Nothing is included simply to make the label look longer.

You don't need sugar simply to drink water or replace fluids, but a small amount of carbohydrate can serve a functional purpose in an electrolyte drink.

HYK Essentials contains 5g of cane sugar, while Endurance Formula contains 6g. Glucose and sodium are transported together in the small intestine, which can support the absorption of sodium and water.

HYK's use of cane sugar is intentional so that you get the maximum benefit from your electrolytes. Our formulas are hydration and performance products and this small amount of sugar helps meet the demands of endurance athletes.

Yes. Electrolytes and hydration can help reduce one of the major contributors to the “bonk” — dehydration.While glycogen depletion is a major cause of bonking during prolonged endurance exercise, dehydration can compound fatigue, increase cardiovascular and thermal strain, and make it harder to maintain performance. When you’re deep into a long run, staying properly hydrated and replacing electrolytes lost through sweat can help you keep going when the effort starts to get difficult.

There’s also a mental side to the bonk. As fatigue builds, focus, alertness, and perceived effort can become major limiting factors. That’s where HYK Endurance Formula is designed to go beyond basic hydration. It combines 800mg of sodium and 450mg of potassium with 100mg of caffeine, L-theanine, L-tyrosine, and 200mg of Alpha-GPC to support hydration, energy, and focus when the miles start to pile up.

HYK can be part of a broader endurance strategy by helping you replenish electrolytes and fluids. For long events, pair your hydration strategy with an appropriate fueling plan based on the demands of your effort.

There isn't one universal timing strategy for every runner. Electrolyte needs depend on sweat rate, exercise duration, intensity, temperature, humidity, and individual tolerance.

For shorter or moderate sessions, Essentials can be used as part of your normal hydration routine. For longer or more demanding runs, Endurance Formula can be used before and during the effort as part of a broader hydration and performance strategy.

The best strategy is the one you practice consistently during training before relying on it during a race.

It depends on the athlete and the effort. For everyday hydration, 800mg is a substantial amount. For endurance athletes training hard for long periods, it can be very appropriate. Sweat sodium concentration varies significantly between athletes, but research commonly finds roughly 500–1,400mg of sodium lost per liter of sweat, with some athletes losing considerably more. As exercise intensity increases, both sweat rate and sweat sodium concentration can rise, increasing total sodium losses.

That’s why 800mg of sodium per stick is right in the sweet spot for endurance-focused hydration. HYK Endurance Formula delivers 800mg of sodium alongside 450mg of potassium and 60mg of magnesium — giving serious runners meaningful electrolyte replacement when the miles, heat, and sweat start adding up.

Your ideal intake will always depend on your individual sweat rate, sweat sodium concentration, duration, and conditions. But for long, demanding endurance efforts, 800mg is far from excessive — it’s a purposeful amount designed for the demands of the sport.

There is no single number that applies to everyone. Sweat losses vary significantly from athlete to athlete and can change based on temperature, humidity, exercise intensity, body size, clothing, acclimatization, sweat rate, and individual sweat composition.

Sodium is typically the primary electrolyte lost in sweat, but sweat also contains potassium, magnesium, calcium, and other minerals.

This is one reason HYK doesn't promote a one-size-fits-all hydration prescription. Understanding your own sweat rate and how you respond to different conditions can help you build a more effective hydration strategy.

Yes. HYK's current formulas do not contain ingredients that appear on the World Anti-Doping Agency (WADA) Prohibited List.

However, HYK products are not NSF or WADA-certified products, and athletes subject to anti-doping rules are responsible for understanding the requirements of their governing organization and competition.

Athletes competing under anti-doping rules should always review the current WADA Prohibited List and their applicable organization requirements before using any supplement.

HYK and LMNT take different approaches to hydration.

LMNT's standard formula is centered around a high-sodium electrolyte profile. HYK offers two formulas designed around different levels of demand.

HYK Essentials provides balanced daily electrolyte hydration, while HYK Endurance Formula combines 800mg sodium with energy, focus, and recovery ingredients for demanding endurance efforts.

The right choice depends on what you want your hydration formula to do for you.

HYK and Liquid I.V. are both hydration products, but their formulas are built differently.

HYK Essentials is designed around a balanced electrolyte system with sodium, potassium, magnesium, and calcium plus Vitamin C, Vitamin D, Zinc, and 5g of cane sugar.

HYK Endurance Formula goes further by combining hydration with caffeine, focus-support ingredients, and taurine for demanding endurance efforts.

HYK is designed for athletes who want hydration to be part of a broader performance system.

HYK offers a broader two-formula system designed around different hydration needs.

HYK Essentials provides a balanced electrolyte foundation for everyday hydration, training, moderate activity, hiking, and electrolyte replenishment.

HYK Endurance Formula is designed for longer and harder efforts, adding energy, focus, and recovery support to a high-sodium electrolyte formula.

If you're comparing products, look beyond the front of the package and compare the actual electrolyte profile, ingredients, serving size, and intended use.

HYK products are made in the USA in a cGMP-certified, FDA-registered manufacturing facility.

We believe quality starts with purposeful formulation and extends through manufacturing, testing, packaging, and finished-product handling.

Our goal is simple: make products we are proud to put our name on and that athletes can feel confident using.

Because we believe the ingredients in an endurance hydration formula should be chosen with purpose. Table salt is essentially refined sodium chloride. HYK Essentials uses sea salt as its sodium source, providing sodium along with naturally occurring trace minerals. Since sweat contains sodium and other electrolytes, we prefer using a less-refined mineral source rather than relying solely on refined table salt.

For HYK Endurance Formula, we take it a step further with a 50/50 combination of sea salt and sodium citrate. Sodium citrate is a highly soluble form of sodium that works well in hydration formulas, while the combination gives us a deliberate way to deliver the sodium endurance athletes need without relying exclusively on sodium chloride.

The result? 800mg of sodium per stick, designed around the significant sodium losses that can occur during long, demanding efforts. HYK doesn't use ingredients simply because they're cheap or conventional. We choose them because they make sense for athletes who are out there putting in the miles.

HYK Essentials is completely caffeine-free and contains no stimulants.

HYK Endurance Formula contains 100mg of caffeine from green tea extract per stick.

Endurance Formula also contains L-theanine, L-tyrosine, and Alpha-GPC as part of its focus system. These ingredients are not stimulants in the same way caffeine is, but they are included to support the formula's focus component.

HYK Essentials can be incorporated into a regular hydration routine, including everyday hydration, training, moderate activity, hiking, travel, and electrolyte replenishment.

Endurance Formula is designed for situations where you want additional performance support and contains 100mg of caffeine per serving, so consider your total daily caffeine intake when using it.

Your individual hydration and electrolyte needs vary based on activity, environment, sweat rate, and personal tolerance.

You don't have to choose one formula forever. The HYK system is designed to let you match your hydration to the demands of the day.

Yes. If you're not happy with your HYK purchase, you can return it. We stand behind our products and wouldn't want anyone to be unhappy with them for whatever reason.

Please see our Shipping & Return Policy for complete details and instructions.

Absolutely. HYK is expanding into select retailers that align with our core principles and the athletes we serve.

If you're interested in carrying HYK, please use our form below to reach out. We'd love to work with you.

Of course. HYK partners with endurance events, races, run clubs, and communities that share our commitment to performance and pushing beyond the ordinary.

If you're interested in discussing hydration, sponsorship, race partnerships, or event support, reach out through our form below.