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OLLI Creatine-XR creatine monohydrate powder 300g designed to support strength, power, and high-intensity training performance for men and women
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  • OLLI Creatine-XR creatine monohydrate powder 300g designed to support strength, power, and high-intensity training performance for men and women
  • OLLI Creatine-XR creatine supplement supporting increased strength, power output, and repeated high-intensity performance
  • OLLI Creatine-XR pure creatine monohydrate providing cellular energy support for explosive training
  • OLLI Creatine-XR creatine monohydrate supplement high quality
  • OLLI Creatine Monohydrate extended release for better mixing
  • OLLI Creatine-XR unflavoured creatine powder mixed with water or protein shake for daily strength support
  • Man or woman using OLLI Creatine-XR creatine monohydrate supplement as part of a strength and performance routine
Creatine-XR

Creatine-XR

£19.99

Creatine-XR is OLLI’s premium creatine monohydrate supplement, designed for men and women who want to improve strength, power, and high-intensity training performance. Creatine is one of the most researched and effective supplements in sports nutrition, consistently shown to support repeated bouts of explosive effort and lean muscle development.

OLLI Creatine-XR uses 100% pure creatine monohydrate, with no fillers, flavours, or unnecessary additives. This simple, transparent formulation makes it easy to stack with other OLLI Performance products and suitable for long-term, daily use.

500 g powder / 100 servings
Benefits

• Increases strength and power output
• Supports lean muscle mass gains
• Improves high-intensity exercise performance
• One of the most clinically researched sports supplements
• Unflavoured and easy to stack
How to use

Mix 1 scoop (3–5g) with water, juice, or a protein shake. Take once daily. Creatine-XR can be taken pre- or post-workout, or at any consistent time on rest days.

Clean, Effective Formulas

No fillers. No unnecessary additives. Just proven ingredients that work.

Mind & Body Support

Every product is designed to boost focus, energy, recovery, and overall wellbeing.

UK-Made Quality

Manufactured in the UK to the highest standards for safety, purity, and trust.

Creatine-XR.
Pure creatine monohydrate
for strength and power.

Creatine-XR is a clean creatine
supplement designed to support strength, power, and performance during
high-intensity training by increasing the availability of cellular energy.

Power your performance.
Build your strength.

Increase Strength & PowerCreatine-XR fuels ATP regeneration, giving you more energy for lifting, sprinting, and explosive movements.

Increase Strength & Power
Creatine-XR fuels ATP regeneration, giving you more energy for lifting, sprinting, and explosive movements.

Enhance Training PerformanceSupports repeated high-intensity efforts, helping you train harder and break through plateaus.

Enhance Training Performance
Supports repeated high-intensity efforts, helping you train harder and break through plateaus.

Promote Lean Muscle GrowthSupports volumization and hypertrophy when combined with resistance training.

Promote Lean Muscle Growth
Supports volumization and hypertrophy when combined with resistance training.

Support Recovery & HydrationImproves muscle cell hydration, aiding recovery and reducing post-workout fatigue.

Support Recovery & Hydration
Improves muscle cell hydration, aiding recovery and reducing post-workout fatigue.

When to use
Olli Creatine-XR
Amino-XR BCAA 2:1:1 formula showing L-Leucine, L-Isoleucine, L-Valine and electrolytes

During Strength or Power Training Phases.

Creatine-XR is ideal during periods focused on strength, power, or muscle building. Daily supplementation helps saturate muscle creatine stores, supporting explosive movements such as lifting, sprinting, and high-intensity interval training. Using creatine consistently during these phases helps increase training output and progressive overload.

On Training Days and Rest Days.

Creatine-XR should be taken daily, not just on workout days. Consistent intake maintains elevated muscle creatine levels, supporting recovery and readiness for your next session. On training days, take it before or after workouts. On rest days, take it at any convenient time.

Alongside Protein or Post-Workout Nutrition.

Creatine-XR works well when taken with protein or post-workout nutrition. Combining creatine with carbohydrates and amino acids may enhance uptake into muscle cells, supporting recovery, muscle fullness, and adaptation to training. This makes it easy to stack with PX-Protein or Protein-i6.
Amino-XR intra-workout BCAA supplement supporting muscle endurance and hydration being poured into a shaker

How it
Works.

Creatine increases the availability of phosphocreatine in muscle cells, which is used to regenerate ATP, the body’s primary energy currency during short-duration, high-intensity exercise. Higher phosphocreatine availability supports improved power output, strength, and the ability to repeat intense efforts with less fatigue.

Who Creatine-XR is for

  • Strength and resistance trainers aiming to increase power and lifting performance
  • Athletes performing explosive or high-intensity training
  • Gym-goers focused on lean muscle growth and training progression
  • HIIT, sprint and short-burst performance athletes
  • Active individuals seeking a proven creatine monohydrate supplement

Who it’s not for

  • Those not training regularly or performing high-intensity exercise
  • Endurance-only athletes with no power or strength demands
  • Individuals with kidney conditions without medical advice
  • Under-18s unless advised by a healthcare professional
  • Anyone seeking stimulant-based energy or pre-workout effects
BCAA amino powder

Scientifically Proven to Boost Performance

Pure creatine monohydrate to support strength, power, and explosive training performance.

Creatine supplement container with scoop on a light blue background

How OLLI Creatine-XR stands out

Flavoured creatine blends

Many creatine products include flavours, sweeteners, or additional ingredients that add cost without improving effectiveness.

Under-dosed creatine capsules

Capsule-based creatine often provides lower doses per serving and higher cost per gram.

Where OLLI Creatine-XR wins

OLLI Creatine-XR delivers 100% pure creatine monohydrate in an unflavoured powder format, making it easy to dose correctly, easy to stack, and cost-effective for long-term performance support.

Frequently Asked Questions
Creatine-XR
What does creatine do and how does it work?

Creatine is a naturally occurring compound found in muscle and brain cells that plays a central role in energy metabolism. When you exercise, your body uses adenosine triphosphate (ATP) as its primary energy source. Creatine helps recycle ATP by replenishing phosphocreatine stores in cells, allowing muscles to sustain high-intensity efforts like weightlifting or sprinting for longer periods. This results in improved strength, power, and training capacity. Creatine supplementation increases the availability of phosphocreatine, which supports faster ATP regeneration and ultimately helps you train harder and recover more efficiently. Its benefits are well documented in sports nutrition research and are why creatine is one of the most widely studied and recommended supplements for performance. While most research focuses on muscle energy, creatine is also used by the brain to support cellular energy, as both muscle and brain tissues rely on efficient ATP turnover to function optimally.
Is creatine safe to take every day?

Yes creatine monohydrate is widely considered safe for daily use in healthy adults when taken at recommended doses (typically 3–5 grams per day). Long-term research has shown no adverse effects on kidney or liver function in healthy individuals, and creatine does not cause dehydration or cramps as once commonly believed. While some people may notice slight water retention early in supplementation, this is usually intracellular (within muscle cells) rather than harmful fluid accumulation. Creatine is not an anabolic steroid, and decades of controlled studies have failed to link it to serious risks when used responsibly. Individuals with pre-existing kidney disease, pregnant or breastfeeding women, or those on medications should consult a healthcare professional first. Creatine is also one of the most studied supplements across all age groups, showing a favourable safety profile at standard daily doses.
How much creatine should I take (is 3–5 g/day enough)?

The most effective and evidence-supported dose of creatine monohydrate for everyday users is 3–5 grams per day. This maintenance dose is sufficient for most people to saturate muscle creatine stores over time, supporting strength, power, and recovery benefits without unnecessary side effects. Earlier protocols recommended a short loading phase (e.g., 20 g per day divided into multiple doses for 5–7 days) to saturate muscles more quickly, but research shows that 3–5 g daily will reach similar levels within 2–4 weeks without loading. Taking more than this maintenance amount does not appear to provide additional benefits because your muscles can only store a limited amount of creatine, and excess is excreted. Splitting higher doses into smaller portions can sometimes minimise mild digestive discomfort if it occurs.
Do I need to do a loading phase?

Loading creatine is optional. A traditional creatine loading protocol involves taking 20–25 grams per day split into multiple smaller doses for about 5–7 days to saturate muscle stores rapidly. However, research indicates that a standard daily dose of 3–5 grams will achieve full muscle creatine saturation within a few weeks without the need for a loading phase and with fewer gastrointestinal side effects. Many people prefer the simpler daily dosing approach because it’s easier to stick with and avoids potential bloating or stomach upset seen with higher doses. Ultimately, whether you choose to load or not depends on your timeline — loading can speed up initial saturation, but daily maintenance dosing is equally effective over time.
Will creatine make me bloated or retain water?

Some people experience mild water retention - but it’s typically intracellular (inside muscle cells), which can make muscles look fuller and may slightly increase body weight. This is a normal effect of increased phosphocreatine storage and is not harmful. Creatine does not cause fluid overload in the rest of the body, and many users report little to no bloating, especially when using regular maintenance doses instead of high loading doses. Staying well-hydrated and splitting doses can reduce any mild gastrointestinal discomfort or perceived bloating.

Scientific Evidence

Creatine Monohydrate is the most researched supplement for optimizing strength, power, and muscle mass. It works through three core mechanisms proven by science:
Creatine and Strength Performance

The Claim: Creatine supplementation improves strength and power performance.

The Evidence: A position stand published in the Journal of the International
Society of Sports Nutrition concludes that creatine monohydrate is
effective for increasing strength and power. Reference: Kreider, R. B., et
al. (2017). https://pubmed.ncbi.nlm.nih.gov/28615996/
Creatine and Lean Mass

The Claim: Creatine supplementation supports increases in lean body mass when
combined with resistance training.

The Evidence: A meta-analysis in Medicine & Science in Sports &
Exercise reports greater lean mass gains in creatine users compared to
placebo. Reference: Chilibeck, P. D., et al. (2017).
https://pubmed.ncbi.nlm.nih.gov/28723869/
Safety of Long-Term Creatine Use

The Claim: Creatine monohydrate is safe for long-term use in healthy adults.

The Evidence: A comprehensive review in Molecular and Cellular Biochemistry
reports no adverse effects from long-term creatine supplementation in healthy
individuals. Reference:
Poortmans, J. R., & Francaux, M. (2000).
https://pubmed.ncbi.nlm.nih.gov/10896374/

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