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Premium electrolyte formula designed for real life performance.

4.8
★ ★ ★ ★ ★
(187)

From tough workouts to long workdays, Kaiju keeps you powered, focused, and hydrated—backed by science, trusted by elite athletes.

35% off on all orders

Kaiju
Free Premium 550ml Bottle with first order
  • Renews every 28 days
  • 60 days refund policy
  • Subscribe — ship free in 48h
  • Cancel anytime
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  • Tested for doping substances
    Tested for doping substances
  • Manufactured in Germany
    Manufactured in Germany
  • Created by an Olympic Champion
    Created by an Olympic Champion
  • Surfrider Foundation
    Surfrider Foundation
Video poster
Video poster

Athletes need fuel they can trust. Kaiju keeps it simple—clean electrolytes, natural ingredients, and evidence-based formulas that deliver when performance matters most.

Gareth Nicholas
PERFORMANCE NUTRITIONIST
  • NO PRESERVATIVES
  • NO FILLERS
  • NO SUGAR
  • NO ARTIFICIAL COLORS
  • VEGAN
  • NO ARTIFICIAL FLAVORS
  • NOTHING YOU DON’T NEED
  • Elite-level Dosage Sodium

    Elite-level Dosage Sodium

    Replenishes what you lose through sweat to maintain optimal hydration.

  • Potassium for Muscle Balance

    Potassium for Muscle Balance

    To support muscle contraction, nerve signaling, and steady energy output.

  • Magnesium for Recovery and Focus

    Magnesium for Recovery and Focus

    A highly bioavailable form that reduces fatigue and supports over 300 enzymatic reactions.

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Performance Pack

Core + Kick Performance Bundle

4.8
★ ★ ★ ★ ★
(220)

From tough workouts to long workdays, Kaiju keeps you powered, focused, and hydrated—backed by science, trusted by elite athletes.

37% off on all orders

Monthly
Kaiju Test
Free Premium 550ml Bottle with first order
  • Renews every 28 days
  • 60 days refund policy
  • Subscribe — ship free in 48h
  • Cancel anytime

THE PERFORMANCE COMMITTEE

Kaiju unites elite athletes and sports scientists to design formulas tested in training and proven in competition.

Video

Tom Digby

Olympic Champion and world-class rower bringing firsthand insight into endurance, recovery, and sustained high performance.

Hélène Defrance

Sports scientist and Olympic medalist bridging research and practice to ensure Kaiju’s formulas meet the demands of real athletes.

Gareth Nicholas

Renowned sports nutritionist shaping Kaiju’s formulations with evidence-based expertise and a deep understanding of performance fueling.
Athlete photo

“As a sprinter and engineer, I demand fuel that performs.
Kaiju gives me hydration, electrolytes, and real science behind every scoop, so I can push harder, recover faster, and stay true to my values.”

Younes Nezar @younivers
Athlete & content creator
Signature

HOW TO USE

STEP 1

Pour 500–750 ml (17–25 oz) of cold water into your bottle.

STEP 2

Add your fuel. Tear open one stick and pour it in.

STEP 3

Shake for 10–15 seconds until fully dissolved.

STEP 4

Sip before, during, or after training to fuel, hydrate, and recover.

KAIJU HYDRATION BENEFITS

OPTIMAL HYDRATION

Rebalances electrolytes for sustained endurance and focus.

FASTER RECOVERY

Replenishes vital minerals lost through sweat to bounce back stronger.

MUSCULAR PERFORMANCE

Powers muscle function and reduces fatigue & cramps.

MENTAL CLARITY

Prevents brain fog, headaches, and distraction.

Hélène Defrance

Nutritionist

MORE THAN PRODUCTS - A LONG-TERM MOVEMENT LED BY ATHLETES, FOR ATHLETES.

MORE THAN PRODUCTS - A LONG-TERM MOVEMENT LED BY ATHLETES, FOR ATHLETES.

Over the years, many brands that sponsor athletes have focused more on visibility than on actually helping them perform, sometimes even getting in the way of it.

We built Kaiju to do what most brands no longer do: focus on what athletes really need to train, push, recover, and start again. On the water, in the gym, and in everyday life. With products designed for real performance, not for marketing decks.

And we’re building it with athletes, not just for them. They test, challenge, and shape what we create. They’re part of the process, not just here to pose with our logo.

Kaiju is about supporting performance. Respecting it, fueling it, and standing alongside those who live it every day.

TOM DIGBY
Olympic Champion and Kaiju's co-founder
Tom Digby

FAQ

What makes Kaiju different from other electrolyte products?

Most hydration products are designed to taste nice, not to perform. Kaiju was developed with Olympic-level athletes and sports scientists to replicate what your body truly loses through sweat.

It delivers higher sodium levels for real rehydration, balanced potassium and magnesium for muscle and nerve function, and absolutely no sugar, fillers, or artificial sweeteners. Every batch is tested for doping substances and certified by Informed Sport, so you can trust exactly what goes into your body.

How much sodium do I actually need?

Sweat sodium losses vary hugely from one person to another — from around 600 mg to more than 1,200 mg per hour of training. If you only replace water, you dilute your electrolytes and risk fatigue, cramps, or even hyponatremia. Kaiju provides an elite-level sodium dosage that matches the needs of real athletes, keeping your cells hydrated and your energy systems firing under pressure.

Why is there no sugar in Kaiju?

Because sugar is not what drives hydration. It slows gastric emptying and can cause stomach distress, especially in long or hot sessions. Kaiju focuses on clean electrolyte delivery — the minerals that actually move water into your cells.

When you need carbohydrates for fueling, you can easily combine Kaiju with your preferred energy source, without any overlap or digestive discomfort.

Can I use Kaiju outside of training?

Definitely. Kaiju was built for performance, but it supports recovery and concentration in any demanding situation — long workdays, travel, heat exposure, or even days when you simply feel depleted. Proper hydration helps mental clarity, muscle recovery, and overall well-being far beyond sport.

How should I take it for best results?

Mix one stick with 500 to 750 ml of cold water. For light or moderate activity, one stick per hour is enough. During intense sessions or in hot conditions, two sticks per hour help maintain full electrolyte balance. You can drink it before, during, or after your effort to stay ahead of dehydration rather than catching up.

Is Kaiju safe for tested athletes?

Yes, completely. Kaiju is manufactured in Germany in a certified facility and every production batch is rigorously tested under the Informed Sport program. That means each ingredient, and the final product, is screened for prohibited substances before it reaches you. It is trusted by professional teams and Olympic champions who compete under strict anti-doping regulations.