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Tomorrow's miles start tonight

trusted by the best

Owen Farrell

"This creatine helps me stay consistent and perform when it matters"

Owen Farrell  England Rugby Player
Gabby Logan

"For me, it's about trust, quality and knowing I am looking after myself properly"

Gabby Logan  TV Presenter & Podcaster
Jason Fox

"100% it changed the game for me, big-time, my sleep is next level"

Jason Fox  Ex-Special Forces
Tom Curry

"When the demands are high, this helps my body hold up and recovery stay consistent"

Tom Curry  England Rugby
Jason Roy

"You feel the difference in recovery, less aches and more energy"

Jason Roy  Ex-England Cricketer

RUN AGAIN

Consistent daily use keeps your muscles saturated with creatine so every run doesn't feel like a chore.

RECOVER FASTER

5g creatine monohydrate replenishes your muscles' energy stores so you bounce back faster.

SLEEP DEEPER

1250mg Magnesium Bisglycinate calms your nervous system and supports quality sleep.

ATHLETE TESTED

Every batch is Informed Sport tested and free from banned substances, artificial sweeteners and fillers.

founded by world-class athletes

The UK’s first BSCG and Informed Sport tested supplements brand, founded by ex-international rugby players George Kruis and Dom Day.

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no hype. just real results.

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built to outperform

OTHERS
Purity Tested
Micronised Powder
no bulking agents
Informed sport tested
made in the uk
Smooth Dissolve

The gold standard

Every batch is tested to elite standards, because you deserve supplements that are clean, safe, and built to be trusted.

your questions, answered

your questions, your questions, your questions,

Backed by in-house nutrition and technical experts who know exactly what goes into every product.

What does creatine do for runners?

Creatine helps your body produce energy more efficiently during high-effort moments like hills, sprint finishes, intervals, and faster-paced sessions.

For runners, it may help support:

  • Repeat sprint ability
  • Recovery between hard efforts
  • Training quality and consistency
  • Muscle recovery after long runs or races
  • Strength and resilience alongside running training

It’s especially useful for runners combining endurance work with speed sessions, strength training, Hyrox, or hybrid training.

Is creatine useful for endurance runners?

Yes. While creatine is often linked with strength training, research shows it can also benefit endurance athletes — particularly during sessions involving repeated high-intensity efforts.

For runners, this may include:

  • Intervals
  • Hill reps
  • Race surges
  • Sprint finishes
  • Tempo sessions
  • Hybrid or cross-training workouts

It may also help reduce fatigue and improve recovery between harder training days.

What makes fourfive Creatine + Magnesium different?

Most creatine products focus purely on performance. fourfive was designed to support both performance and recovery — which matters just as much for runners training consistently week after week.

We combine:

  • 5g of high-purity creatine monohydrate to support performance, recovery, and repeated hard efforts
  • Magnesium glycinate to support relaxation, sleep, and muscle recovery
  • A clean, highly bioavailable formula with no fillers, artificial sweeteners, bulking agents, or unnecessary additives
  • Informed-Sport testing for reassurance at every level of sport

Many creatine products cut corners with lower-grade ingredients or unnecessary extras. We focus on purity, quality, and ingredients your body can actually use — making it easier to support consistent training without compromising recovery or gut comfort.

Why combine creatine with magnesium?

Running places stress on both your muscles and nervous system — especially when training volume, work stress, or poor sleep start to stack up.

Creatine helps support energy production and recovery, while magnesium supports:

  • Muscle relaxation
  • Nervous system function
  • Sleep quality
  • Recovery from training fatigue

Together, they support both performance and recovery — helping you train hard while recovering properly between sessions.

Will creatine make runners gain weight?

Some runners notice a small increase in scale weight when they first start taking it, as creatine helps muscles store more water inside the muscle itself — supporting performance, recovery, and hydration.

With a steady daily dose of 5g, this is usually minimal and far less noticeable than aggressive loading phases.

Many runners use creatine throughout marathon training, speed blocks, and race preparation without feeling heavy or slowed down — while benefiting from improved recovery and training quality.