The science
Creatine 101.
What it is, how it works, and why it belongs in your daily routine.
Start here
One of the most studied ingredients in sports nutrition.
Creatine is a naturally occurring compound found in muscle cells. Your body produces it from amino acids and you get small amounts from meat and fish. As a supplement, it helps your muscles produce energy during high-intensity work. The research is deep, the safety record is long, and the benefits are real.
By the numbers
Backed by science. Built for daily use.
01.
30+
Years of research
Creatine monohydrate has been studied longer and more extensively than almost any other sports supplement.
02.
5g
Clinically studied dose
5g daily is the amount consistently shown effective in the research — pre-measured in every Merivo stick.
03.
NSF®
Certified for Sport
Every batch independently tested against banned substance lists. Cleared for NCAA, Olympic, and professional competition.
04.
0g
Grit. Zero.
Creavitalis® is ultra-micronized — it dissolves completely in any liquid. No chalky residue, no bottom-of-glass settling.
By the numbers
What the evidence actually shows.
Key quantitative findings from peer-reviewed trials and meta-analyses.
Published studies
More research than any other performance supplement in existence — across age groups, fitness levels, sexes, and health conditions.
Kreider et al., 2017 — J. International Society of Sports Nutrition
Strength performance
Mean improvement in high-intensity strength and power output across 22 independent trials.
Rawson & Volek, 2003 — J. Strength and Conditioning Research
Years of research
Continuously studied since Harris et al. first documented muscle creatine elevation in 1992.
Harris, Soderlund & Hultman, 1992 — Clinical Science
Cognitive RCTs
Randomized controlled trials in the most recent meta-analysis. Significant effects on memory and processing speed.
Forbes et al., 2022 — Nutrients
Common questions
Everything you want to know. Answered.
What is creatine and how does it work?
Creatine is a naturally occurring compound your body makes from amino acids. In your muscles, it combines with phosphate to form phosphocreatine — your muscles' fastest energy source for high-intensity bursts. Supplementing with creatine increases your phosphocreatine stores, helping your muscles recover energy faster between efforts. More energy available means better reps, better output, better training consistency over time.
Why 5g? Do I need to do a loading phase?
5g is the clinically studied daily dose — the amount research consistently supports for saturating your muscles over time. A loading phase (taking 20g/day for a week) gets you there faster but isn't necessary. Daily consistency at 5g gets you to the same place within 3–4 weeks. One Merivo stick is exactly 5g. No measuring, no math.
When should I take it?
Whenever fits your routine. Creatine works through accumulation, not acute timing — consistency beats precision here. Most people take it with their morning coffee, during training, or right after. Pick a time you'll actually remember and stick with it.
What is Creavitalis® and why does it matter?
Creavitalis® is ultra-micronized creatine monohydrate produced by AlzChem Trostberg GmbH — the same German facility that makes Creapure®, the benchmark in pharmaceutical-grade creatine. Ultra-micronized means the particles are ground to a much finer size, so Creavitalis® dissolves completely in liquid — hot or cold — with no grit and no residue. FDA GRAS status. FSSC 22000 certified. Over 30 years of pharmaceutical-grade manufacturing.
Is creatine safe?
Yes. Creatine monohydrate is one of the safest and most studied supplements in existence. The International Society of Sports Nutrition has reviewed the evidence and concluded it is generally safe and well-tolerated in healthy adults. Over 30 years of research and more than 1,000 peer-reviewed studies support that conclusion. As with any supplement, consult your doctor if you have a pre-existing medical condition.
Does Merivo contain caffeine?
Lemon Creatine has no caffeine — take it any time, day or night. Creatine Coffee contains approximately 100mg of natural caffeine from Rainforest Alliance Certified™ freeze-dried arabica coffee. Nothing synthetic, nothing added.
What does third-party tested mean?
It means an independent lab — one with no financial relationship to Merivo — tests every batch for purity, potency, and banned substances before it reaches you. Merivo uses NSF Certified for Sport®, the highest standard in sports nutrition testing. Every batch is cleared before it ships.
Primary sources
The evidence, unfiltered.
Peer-reviewed studies, meta-analyses, and regulatory findings spanning 1992–2025. Organized by topic — linked directly to the source.
Safety & clinical guidelines
Position statements, regulatory findings, and expert consensus — from the first human trials through to current governing body recommendations.
Kreider RB, Jäger R, Purpura M — Nutrients —
Head-to-head comparison of creatine monohydrate against alternative marketed forms. Conclusion: creatine monohydrate remains the most bioavailable, best-evidenced, and safest form. No alternative form demonstrates superior efficacy.
Antonio J, Candow DG, Forbes SC, et al. — Journal of the International Society of Sports Nutrition —
Expert consensus from 11 leading researchers directly refuting 12 common myths — kidney damage, hair loss, cramping, and more. Conclusion: the safety evidence is overwhelming with no credible evidence of harm at standard doses.
Kreider RB, Kalman DS, Antonio J, et al. — Journal of the International Society of Sports Nutrition —
Creatine monohydrate is the most effective ergogenic nutritional supplement for increasing high-intensity exercise capacity and lean body mass. Long-term use is safe and well-tolerated.
EFSA Panel on Dietetic Products, Nutrition and Allergies — EFSA Journal —
The European Food Safety Authority established a cause-and-effect relationship between daily creatine supplementation (3g) and increased performance in high-intensity exercise.
Hultman E, Soderlund K, Timmons JA, et al. — Journal of Applied Physiology —
Established the loading-then-maintenance protocol: 20g/day for 6 days raises muscle creatine ~20%, then maintained with just 2g/day. The study that defined how creatine is dosed to this day.
Harris RC, Soderlund K, Hultman E — Clinical Science —
The foundational study: oral creatine supplementation elevated total muscle creatine by up to 50% in some subjects. All modern dosing protocols descend from this work.
Muscle strength & exercise performance
From the first PCr resynthesis trials in 1994 to the most recent meta-analyses — three decades of consistent findings.
Wang Z, Lin T, Lin X, et al. — Nutrients —
Based on 23 RCTs: creatine plus resistance training significantly increased both upper- and lower-body strength compared to training alone in adults under 50.
Wax B, Kerksick CM, Jagim AR, et al. — Nutrients —
Comprehensive review confirming creatine's ergogenic effects on high-intensity, short-duration exercise and supporting roles in post-exercise recovery, injury prevention, and neuroprotection.
Lanhers C, Pereira B, Naughton G, et al. — Sports Medicine —
Meta-analysis of 22 trials: creatine supplementation significantly increased upper limb strength, with consistent effects across age groups and training backgrounds.
Branch JD — International Journal of Sport Nutrition and Exercise Metabolism —
Synthesised over 100 studies and found significant effects on lean body mass, total work output, and strength performance across a broad range of populations.
Rawson ES, Volek JS — Journal of Strength and Conditioning Research —
Narrative review of 22 studies: creatine consistently increased maximum strength and power in high-intensity exercise. Mean improvement: approximately 8%.
Greenhaff PL, Bodin K, Soderlund K, Hultman E — American Journal of Physiology —
First study to directly demonstrate that creatine loading accelerates phosphocreatine resynthesis during muscle recovery — directly linking supplementation to the ATP-PCr energy system.
Cognitive function & brain health
Studies on creatine's role in brain energy metabolism, memory, processing speed, and resilience under stress.
Sandkuhler JF, Kersting X, Fischbach A, et al. — BMC Medicine —
Largest preregistered crossover RCT on creatine and cognition (n=123, 5g/day, 6 weeks). Primary outcomes not statistically improved. Authors' conclusion: minimal cognitive benefit at standard doses in generally healthy, well-nourished adults.
Prokopidis K, Giannos P, Triantafyllidis KK, et al. — Nutrition Reviews —
After published correction, statistically significant memory benefit was robust specifically in older adults (66–76 years). Benefits most consistent in populations with lower baseline brain creatine.
Forbes SC, Cordingley DM, Cornish SM, et al. — Nutrients —
Comprehensive review: creatine supplementation raises brain PCr stores and shows consistent benefits for memory, processing speed, and cognitive resilience — particularly under metabolic stress.
Rae C, Digney AL, McEwan SR, Bates TC — Proceedings of the Royal Society B —
Vegetarians supplementing with creatine showed significant improvements in working memory and fluid intelligence — demonstrating that dietary creatine status directly affects cognitive function.
Watanabe A, Kato N, Kato T — Neuroscience Research —
Creatine supplementation reduced mental fatigue during prolonged cognitive tasks. MRI spectroscopy confirmed a 9% increase in brain creatine levels.
Women's health
Research on creatine across the female lifespan — exercise performance, menstrual cycle effects, pregnancy, and menopause.
Smith-Ryan AE, Cabre HE, Moore SR, et al. — Journal of the International Society of Sports Nutrition —
Lifespan review arguing that female creatine kinetics are uniquely modulated by reproductive hormones — and that the field is severely understudied relative to its clinical significance.
Smith-Ryan AE, Cabre HE, Eckerson JM, Candow DG — Nutrients —
Comprehensive review of creatine across the female lifespan — exercise performance, bone health, cognitive function during menopause. Consistently safe and effective across all life stages studied.
Pinheiro Dos Santos EE, de Araujo RC, Nunes-Silva A, et al. — Nutrients —
Meta-analysis: creatine plus resistance training significantly improves muscle strength in older females, with robust effect sizes in programs lasting at least 24 weeks.
Longevity, bone health & aging
Research on creatine beyond athletic performance — sarcopenia, bone mineral density, frailty, and healthy aging.
Sharifian G, Aseminia P, Heidary D, Esformes JI — European Review of Aging and Physical Activity —
Meta-analysis of 20 RCTs (n=1,093, 69% female): creatine plus exercise training significantly increased 1RM strength and reduced body fat percentage compared to exercise alone in older adults.
Candow DG, Forbes SC, Ostojic SM, et al. — Bone —
Synthesizes evidence that creatine combined with resistance training improves muscle mass, bone mineral density, and physical function relevant to sarcopenia, osteoporosis, and frailty.
Chilibeck PD, Kaviani M, Candow DG, Zello GA — Open Access Journal of Sports Medicine —
Meta-analysis: creatine combined with resistance training produced significantly greater gains in lean tissue mass and both upper- and lower-body strength in older adults.
Candow DG, Forbes SC, Kirk B, Duque G — Nutrients —
Positions creatine as a multifaceted therapeutic tool for older adults, covering muscle and bone as well as emerging evidence for brain health, cardiovascular benefit, and cachexia.
Candow DG, Chilibeck PD, Forbes SC — Endocrine —
Review linking creatine supplementation to improved bone mineral density, reduced sarcopenia risk, and maintenance of muscle mass in aging populations.
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