Creatine for Beginners: Evidence, Dose and Safety

Quick answer

Creatine for beginners, in short: Creatine is one of the most researched supplements there is. The best evidence is for muscle: in older adults who do resistance training (such as lifting weights or using resistance bands), taking creatine was linked to a small extra gain in lean mass and some strength measures [1][2]. The evidence for memory and thinking is much less settled [4][5][6]. Overall we rate the evidence B (good for specific outcomes, with gaps). It is best thought of as a helper for training, not a stand-alone fix.

What is creatine?

Your body makes creatine from amino acids (the building blocks of protein), and you also get some from meat and fish [7]. Most of it is stored in your muscles, where it helps cells release quick bursts of energy during short, hard effort [7].

The type used in nearly all research is creatine monohydrate. It is not a stimulant or a steroid.

Creatine for beginners: what might it help with?

Possible benefit	Rating	In plain words
Lean muscle mass (older adults who strength-train)	Strong	Several meta-analyses found a small extra gain compared with training alone [1][2]
Strength (older adults who strength-train)	Promising	Some strength tests improved more, others did not [1][2]
Short, repeated bursts of hard exercise (adults)	Strong	A European Food Safety Authority review accepted this at 3 g a day [11]
Memory	Promising	Pooled trials suggest a small benefit, but results vary a lot between studies [4][5]
Overall thinking skills, attention, processing speed	Mixed	No clear effect on overall thinking in one big review [5]; evidence in older adults is thin [6]

Ratings describe how good the research is, not a promise that it will work for you.

What the research says

• Muscle in older adults. A 2017 review pooled 22 trials with 721 adults (average ages 57 to 70). People taking creatine while strength-training gained about 1.4 kg more lean mass than those training with a placebo, plus some extra strength [1]. An earlier review of 357 older adults pointed the same way, though not every strength test improved [2]. PubMed · DOI
• Does the way you dose matter? A 2021 review found the gains varied with the dosing approach used in different trials [3]. PubMed · DOI

Creatine and brain health: what the reviews disagree on

• Memory. A 2023 review of 8 trials found a small memory improvement in healthy people, bigger in people aged 66 to 76, but the trials differed a lot from one another [4]. PubMed · DOI A 2024 review of 16 trials (492 people) agreed on memory but found no clear effect on overall thinking, and most results were rated low-certainty [5]. PubMed · DOI
• Older adults only. A 2026 review found just two supplement trials among six studies in people aged 55 and over, so firm conclusions are not possible yet [6]. PubMed · DOI
• A skeptical view. One 2024 review argued that the research does not back up the idea of how creatine might help the brain [8]. PubMed · DOI

A corrigendum (a published correction) to the 2024 review [5] appeared in 2025 [12]. PubMed’s record doesn’t say what changed, so treat that review’s exact figures with extra caution.

Amounts and how people take it

These are amounts used in studies, not recommendations.

• Form: creatine monohydrate powder or capsules.
• Usual daily amount: about 3 to 5 g a day. Some larger athletes use 5 to 10 g [7].
• Loading phase (optional): some studies used about 0.3 g per kg of body weight a day for 5 to 7 days, then 3 to 5 g a day. Starting at 3 g a day without loading raises muscle stores more slowly, over around 3 to 4 weeks [7].
• Older-adult trials combined creatine with resistance training 2 to 3 days a week for 7 to 52 weeks [1].

Creatine for women and men over 50

The older-adult reviews included both men and women, with average ages from 57 to 70 across trials, and did not report results separately for each sex [1][2]. We therefore have no separate figures to quote for women or for men, and we don’t make a claim that one benefits more. The research is about creatine combined with resistance training in that age range [1].

Side effects, interactions and who should check first

Common effects

Creatine can make your muscles hold a little extra water, so some weight gain (roughly 0.5 to 1 liter of water during loading) is normal [7]. A sports-nutrition review found no evidence of extra cramps, dehydration, stomach upset or kidney problems in healthy people, with follow-up of up to 3 years in athletes [7]. Data on long-term use in older people who don’t exercise are thinner.

Creatine, kidneys and the creatinine blood test

Creatine can nudge up creatinine, a blood marker doctors use to check kidneys. A 2025 review found a small rise but no significant change in a direct measure of kidney filtering, which suggests it reflects how creatine is processed rather than kidney damage [9]. Tell whoever reads your results that you take it.

Who should check with a doctor or pharmacist first

Check with a doctor or pharmacist first if you:

• have kidney disease, or take medicines that affect the kidneys (for example anti-inflammatory painkillers such as ibuprofen, ACE inhibitors for blood pressure, or ciclosporin). Drug-interaction databases flag these as minor or theoretical, based on how the kidneys clear substances, and a 2026 review found no controlled human studies testing creatine alongside medicines [10]
• take other medicines cleared by the kidneys, such as trimethoprim, cimetidine, probenecid, entecavir or pemetrexed. These were listed as possible interactions in databases, again without confirmed harm [10]
• are pregnant or breastfeeding, or are under 18. We didn’t find reliable evidence on safety in these groups.

Creatine and medicines

A 2026 narrative review found no controlled human studies testing creatine alongside medicines, and interaction databases flag only minor or theoretical possibilities [10]. Ask a doctor or pharmacist if you take any medicine.

Where to buy

Look for plain creatine monohydrate (the form with the most research) and a label that shows the amount per serving. Third-party testing marks from a recognized testing scheme are a useful extra. a useful extra. Our creatine buying guide explains how we choose products.

FAQ

What is creatine?

Creatine is a compound your body makes from amino acids and also gets from meat and fish, and most of it is stored in your muscles [7]. Supplements use creatine monohydrate, the form used in nearly all research. It is not a stimulant or a steroid, and it is best thought of as a helper for training.

Does creatine work?

The best evidence is for muscle: older adults who did resistance training gained a small extra amount of lean mass and some strength [1][2]. The evidence for memory and thinking is much less settled [4][5][6], so we rate the overall evidence B, good for specific outcomes with gaps.

How much creatine per day?

Studies usually use about 3 to 5 g a day of creatine monohydrate. Some larger athletes use 5 to 10 g, and some studies used a short loading phase first [7]. These are amounts used in studies, not recommendations, so check with a doctor or pharmacist if you have any health condition.

Who should not take creatine?

Anyone with kidney disease, anyone taking medicines that affect the kidneys, and anyone who is pregnant, breastfeeding or under 18 should check with a doctor or pharmacist first. We didn’t find reliable safety evidence for the last group, and a 2026 review found no controlled studies of creatine with medicines [10].

Can you take creatine without working out?

Most of the muscle evidence comes from older adults who combined creatine with resistance training 2 to 3 days a week [1], so we can’t say what it does on its own. Long-term data in older people who don’t exercise are also thinner [7]. The research doesn’t show that it works as a stand-alone supplement.

Related pages

• Creatine vs protein
• Glycine: another amino-acid supplement
• Our creatine buying guide
• Longevity supplements for beginners: where this fits in a beginner’s routine
• All supplements A-Z

Talk to your doctor

This page is for general information and is not medical advice. Speak to a doctor or pharmacist before starting any supplement, especially if you are pregnant or breastfeeding, take any medicine, or have a health condition.

References

We cite only studies and official pages we checked against PubMed, the publisher or the agency’s own site. The A to E evidence grades are explained in our editorial policy. See also our medical disclaimer and affiliate disclosure.

1. Chilibeck PD, Kaviani M, Candow DG, Zello GA. Effect of creatine supplementation during resistance training on lean tissue mass and muscular strength in older adults: a meta-analysis. Open Access J Sports Med. 2017. PubMed · DOI
2. Devries MC, Phillips SM. Creatine supplementation during resistance training in older adults - a meta-analysis. Med Sci Sports Exerc. 2014. PubMed · DOI
3. Forbes SC, Candow DG, Ostojic SM, Roberts MD, Chilibeck PD. Meta-analysis examining the importance of creatine ingestion strategies on lean tissue mass and strength in older adults. Nutrients. 2021. PubMed · DOI
4. Prokopidis K, Giannos P, Triantafyllidis KK, Kechagias KS, Forbes SC, Candow DG. Effects of creatine supplementation on memory in healthy individuals: a systematic review and meta-analysis of randomized controlled trials. Nutr Rev. 2023. PubMed · DOI
5. Xu C, Bi S, Zhang W, Luo L. The effects of creatine supplementation on cognitive function in adults: a systematic review and meta-analysis. Front Nutr. 2024. PubMed · DOI
6. Marshall S, Kitzan A, Wright J, Bocicariu L, Nagamatsu LS. Creatine and cognition in aging: a systematic review of evidence in older adults. Nutr Rev. 2026. PubMed · DOI
7. Kreider RB, Kalman DS, Antonio J, et al. International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. J Int Soc Sports Nutr. 2017. PubMed · DOI
8. McMorris T, Hale BJ, Pine BS, Williams TB. Creatine supplementation research fails to support the theoretical basis for an effect on cognition: evidence from a systematic review. Behav Brain Res. 2024. PubMed · DOI
9. Naeini EK, Eskandari M, Mortazavi M, et al. Effect of creatine supplementation on kidney function: a systematic review and meta-analysis. BMC Nephrol. 2025. PubMed · DOI
10. Ostojic SM. Potential interactions between creatine supplementation and prescription drugs: a narrative review and evidence-mapping perspective. Curr Ther Res Clin Exp. 2026. PubMed · DOI
11. EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA). Scientific Opinion on the substantiation of health claims related to creatine and increase in physical performance during short-term, high intensity, repeated exercise bouts. EFSA Journal. 2011;9(7):2303. DOI
12. Xu C, Bi S, Zhang W, et al. Corrigendum: The effects of creatine supplementation on cognitive function in adults: a systematic review and meta-analysis. Front Nutr. 2025. PubMed · DOI