• Kaiju - 10 sticks box
1 8
OSMØ®
ANTI-CRAMP FORMULA

CYCLING HYDRATION STICK

4.8 Rating 87 reviews on Trustpilot
Stomach friendly
Easy to mix
Tested by cyclists
Not too sweet
No aftertaste

Built for the rides and races where water alone isn't enough. Each stick: 593 mg sodium, 402 mg potassium, 81 mg magnesium — designed around what cyclists actually lose. No sugar. No sucralose. No fillers.

Stops cramping
593 mg of sodium per serving. Designed for cyclists.
Olympic designed
Built with Olympic Champion Tom Digby and sports scientists, using real athlete sweat rate analysis.
Informed Sport certified
Tested for banned substances. Trusted by tested athletes.
Select Quantity
10 sticks per box
4.8 ★ from 87 reviews · 60-day money back
View full details

SOUND FAMILIAR?

White salt rings on your kit

Cramping during long rides

Headaches after hot training

Hydration tabs that taste sweet but don't actually do anything

You're a heavy sweater. Kaiju is built for you.

Take the 60 second sweat test →

Why cyclists need more sodium than they think

At a steady pace in moderate heat, you can lose up to ~1,200 mg of sodium per hour. Most sports drinks don't come close to replacing that. Kaiju does.

593mg

Sodium per serving

≈10×

More than a typical sports drink

0g

Sugar · sucralose · fillers

HOW KAIJU COMPARES TO OTHER CYCLING ELECTROLYTES

Others
Kaiju
Sodium (Na)
Low dose
≈10× higher
Potassium (K)
Low dose
≈3× higher
Magnesium (Mg)
Missing
Included
Sugar
Dextrose
None
Sweeteners
Sucralose
None
Goal
Flavour
Performance

BUILT ON WHAT CYCLISTS ACTUALLY LOSE

  • Elite level sodium

    593mg

    Elite level sodium

    Replenishes what you lose through sweat to maintain optimal hydration.

  • Potassium for muscle balance

    402mg

    Potassium for muscle balance

    Supports muscle contraction, nerve signalling, and steady energy output.

  • Magnesium for recovery and focus

    81mg

    Magnesium for recovery and focus

    Highly absorbable bisglycinate form, gentler on the gut than common alternatives.

A team that designs your hydration around your physiology.

Olympic Champion. Olympic medalist sports scientist. Performance nutritionist. They built the sweat test that tells you exactly how much sodium you actually lose per hour.

Tom Digby

Olympic champion

Co-founder of Kaiju. World class rower. Brings firsthand insight into endurance, recovery, and sustained performance.

Hélène Defrance

Sport scientist

Olympic medalist. Bridges research and practice.

Gareth Nicholas

Performance nutritionist

Renowned sports nutritionist. Shapes Kaiju's formulations with evidence based expertise.

Take the 60 second sweat test

WHAT CYCLISTS SAY

4.8 ★ from 87 reviews on Trustpilot

No more cramps
★★★★★

"First long ride this year without cramping. Cannot recommend enough."

Marc D.

Endurance cyclist · Girona

No more cramps
★★★★★

"First long ride this year without cramping. Cannot recommend enough."

Marc D.

Endurance cyclist · Girona

No more cramps
★★★★★

"First long ride this year without cramping. Cannot recommend enough."

Marc D.

Endurance cyclist · Girona

No more cramps
★★★★★

"First long ride this year without cramping. Cannot recommend enough."

Marc D.

Endurance cyclist · Girona

No more cramps
★★★★★

"First long ride this year without cramping. Cannot recommend enough."

Marc D.

Endurance cyclist · Girona

How to use

STEP 1

Take the sweat test

Find your sodium loss profile in 60 seconds.

STEP 2

Mix with 500 ml water

Pour one stick into your bottle.

STEP 3

Shake until dissolved

Shake for 10 seconds until fully mixed.

STEP 4

Sip during your ride

Drink before, during, or after your ride to hydrate and recover.

WHAT KAIJU DOES FOR YOU?

STOPS YOU BONKING

Sustained sodium where standard tabs run out. Built for cyclists.

NO MORE CRAMPS

Replaces the salt your body actually loses during a ride.

NO HEADACHES AFTER HOT SESSIONS

Magnesium bisglycinate, not malic acid filler. Gentle on the gut at cycling heart rates.

BOUNCE BACK NEXT MORNING

Better hydration recovery between ride sessions, so weekday training holds up.

FAQ

How many Kaiju sticks should I take on a long ride?

Most heavy-sweater cyclists take one stick (500 ml) before, then one stick per hour during, then one after. For lighter sweaters, one before and one mid-ride is usually enough. Use the 60-second sweat test to dial it in.

Will Kaiju stop me cramping at the end of a long ride?

Most ride-day cramps are sodium-driven. Each stick delivers 593 mg — about 10× a typical sports drink. Sipped steadily through the ride, most heavy-sweater cyclists using Kaiju report no more cramping in the final hour.

Is Kaiju good for gravel and mountain biking?

Yes. The dose, the lack of sugar, and the magnesium bisglycinate form make it well-suited to multi-hour gravel and MTB efforts. Mix into your bottles, hydration pack, or vest reservoir.

Can I use Kaiju for hot-weather training rides?

Yes — hot-weather training is where the 593 mg sodium dose earns its keep. Heavy sweaters can lose 4,000+ mg per hour in heat. Start with one stick per ride; scale to 2 per hour for hot Saturday efforts and sportives.

Should I take electrolytes before, during, or after a ride?

All three for rides over 90 minutes. One bottle to start hydrated, one or two per hour during, one after to begin recovery and reduce the next-day headache.

Why no sugar? I get my carbs from gels and bars.

Exactly. Kaiju is built for hydration, not fuel. Your carbs come from gels, bars, or real food during the ride. Doubling up sugar in the electrolyte makes both jobs worse.

Is Kaiju safe for tested cyclists (UCI, USA Cycling, WADA)?

Yes. Every batch is independently tested by Informed Sport against the WADA prohibited substances list.