Creatine monohydrate UK rules on labels, claims and batch testing

Creatine monohydrate UK rules cover three things you can check yourself: what the label shows, which health claim is authorised and on what condition, and what a batch certificate does and does not prove. This guide explains those points, then what is in CREATREN, a 300g creatine monohydrate and taurine powder, how to read a creatine label, what authorities say about typical intake, who should speak to a professional first, and how ordering works.

It is educational and based on published literature and official guidance. It is not medical advice, and nothing here promises a result.

Key takeaways

• CREATREN is described on its product page as 300g of micronised creatine monohydrate with taurine, about 60 servings of 5g, with two ingredients.
• The product page does not state how many grams of creatine and how many grams of taurine sit in one 5g serving. Check the label, or ask for the certificate for your batch, before assuming a split.
• A 2021 expert review published in the ISSN journal cites 3 to 5 g a day (or 0.1 g/kg body mass) as recommended dosages; the authorised GB claim is tied to 3 g a day. Always follow the product label, and speak to a doctor or pharmacist if you have a medical condition, are pregnant or breastfeeding, or take medicines.
• Independent testing matters: a 2025 laboratory study found deviations of up to 66% above the label figure for creatine and 142% above for taurine in the commercial products tested.
• GOV.UK guidance lists creatine among common types of food supplement.

What is in the product

According to its own product page, CREATREN is a 300g tub of micronised creatine monohydrate combined with taurine. The page gives roughly 60 servings at 5g each and lists two ingredients.

Here is what those terms mean in plain English.

Creatine monohydrate

Creatine monohydrate is the form named on the product page and the form used in all 16 trials of the Xu et al. 2024 cognitive meta-analysis (Xu et al., 2024). The product page lists creatine monohydrate and taurine as its two ingredients.

Micronised

The product page describes the powder as micronised. It does not define the term or give a particle size, so ask the seller if particle size matters to you.

Taurine

Taurine is an amino acid. No authorised health claim for taurine appears in the retained annex we checked (see the rules section), so we make no claim about what it does. Taurine has been studied as a single ingredient in exercise research (see Kurtz et al., 2021), and the evidence is summarised in our companion piece, creatine and taurine: what the evidence says.

What the page does not tell you

The page says each batch is assayed by Janoshik Analytical, an independent laboratory the company says it neither owns nor controls, that a batch number is printed on the tub, and that a Certificate of Analysis is sent on request. It does not give the grams of creatine versus taurine per serving. That matters because a 2021 review of taurine in sport included studies using from under 1 g to 6 g (Kurtz et al., 2021), so you cannot assume a 5g serving of a two-ingredient blend delivers amounts like those.

How to read a creatine monohydrate label in the UK

The checklist in this creatine monohydrate UK buying guide works for any creatine monohydrate product, including this one.

Why the grams-per-serving line matters most

For a two-ingredient product, the split between creatine and taurine is an important figure to check. The government guidance on food supplements tells consumers not to exceed the recommended dose on the label (GOV.UK food supplements guidance). You can only follow that sensibly if the label tells you what each portion contains. If the amounts are unclear, email the seller and ask before you buy.

Why labels and contents can differ

In 2025, researchers published a method for measuring creatine and taurine together using quantitative nuclear magnetic resonance. When they applied it to commercial sports supplements, they found deviations from label claims of up to 65.97% above the label figure for creatine and 141.52% above for taurine, while variation between batches of the same product was at most 8.49% (Der Merwe et al., 2025). The abstract does not identify the products tested, and the study does not concern CREATREN. Our reading, not the authors' conclusion, is that a printed figure on a tub is only as reliable as the testing behind it.

What authorities say about intake and cautions

The following summarises what named bodies and expert groups state about creatine. It is not a recommendation for you. Always check the product label for the portion that applies to the product in your hand, and speak to a doctor or pharmacist if you have a medical condition, are pregnant or breastfeeding, or take medicines.

ISSN position stand and expert reviews

The International Society of Sports Nutrition (ISSN) position stand concluded that short and long-term creatine supplementation was well tolerated in healthy individuals and in a number of patient populations. It also suggested that a habitual low dietary intake, around 3 g a day, across the lifespan might be worthwhile (Kreider et al., 2017). The position stand is not a label and is not a recommendation for you.

A later review by an international team of creatine researchers described creatine as relatively well tolerated at recommended dosages, giving 3 to 5 g a day, or 0.1 g per kilogram of body mass a day, as the usual figures. It noted more than 500 peer-reviewed publications (Antonio et al., 2021). A 2025 follow-up from the same group reviewed further questions, among them timing, caffeine, blood pressure, pregnancy and male fertility (Antonio et al., 2025).

What a 2017 review reports about authority conclusions

Andres and colleagues reported that several competent authorities concluded a daily intake of 3 g of creatine per person is unlikely to raise safety concerns in healthy adults, excluding pregnant and breastfeeding women. The reported adverse effects were occasional: gastrointestinal complaints, muscle cramps and weight gain (Andres et al., 2017). A 2025 short review likewise reported that gastrointestinal discomfort occurs in some people and is dose-dependent (Longobardi et al., 2025).

The authorised creatine claim in the retained regulation, covered below, is tied to a daily intake of 3 g of creatine. That is the only intake figure written into the GB claims text for the general adult claim.

What about the NHS?

When we checked on 2 October 2026, the NHS website search for creatine returned no results, so we do not cite NHS guidance for creatine intake.

A note on taurine

One published risk assessment (not a regulator's opinion) of oral taurine supplementation reported that the evidence for absence of adverse effects in normal healthy adults was strong at the supplemental intakes they assessed, and that data above their reference level were not sufficient to confirm long-term tolerability (Shao and Hathcock, 2008). This is a finding from a 2008 paper, not an advisory limit for CREATREN, whose taurine content per serving is not stated on the product page. Check the product label, and speak to a doctor or pharmacist if you have a medical condition, are pregnant or breastfeeding, or take medicines.

Who should speak to a doctor first

Government guidance advises checking with a GP before using a food supplement if you are pregnant, breastfeeding, have a medical condition or take regular prescribed medication (GOV.UK). The creatine literature points the same way for a few groups.

• People with existing kidney conditions. A 2025 short review reported no adverse renal effects in healthy individuals but advised caution in people with pre-existing kidney conditions, because evidence in that group is lacking (Longobardi et al., 2025).
• Pregnant and breastfeeding women. The same review flagged pregnancy as an area where evidence is lacking, and the authority conclusions cited by Andres et al. were limited to healthy adults other than pregnant or breastfeeding women (Andres et al., 2017).
• People taking medicines. Ask a pharmacist whether any supplement is suitable alongside your prescription.
• Under-18s. The 2021 expert review (Antonio et al., 2021) lists children and adolescents among the questions that remain open. Speak to a doctor or pharmacist about any supplement for someone under 18.

Why creatinine tests come up

A 2025 systematic review (21 studies; 12 in the serum creatinine meta-analysis) reported a small statistically significant rise in serum creatinine (MD 0.07 umol/L). The rise was significant at 1 week or less, not at 1 to 12 weeks, and significant again beyond 12 weeks. The glomerular filtration rate (GFR) meta-analysis found no statistically significant difference. The authors interpreted the change as likely reflecting metabolic turnover rather than renal impairment (Naeini et al., 2025). The authors link creatine intake to raised serum creatinine, which is why they examined kidney function directly. Speak to a doctor or pharmacist if you have a kidney condition or any concern about a blood test.

A 12-week randomised trial in resistance-trained people eating a high-protein diet found no significant difference in GFR measured by 51Cr-EDTA clearance (Lugaresi et al., 2013). This describes a trial design, not a recommendation.

Quality: third-party batch testing and certificates

A printed label states what a maker says is in a tub; a batch assay reports what a laboratory measured. The 2025 qNMR study above shows why the difference matters.

What a batch assay is

A batch assay measures what is actually in a specific production batch. For creatine, the useful questions are how much creatine monohydrate the batch contains and whether any unexpected substances appear. A Certificate of Analysis (COA) is the laboratory's report for that batch. Our guide on how to read a certificate of analysis walks through the typical sections, and a separate article explains who Janoshik Analytical is.

How this works at Free Muscle

Every Free Muscle batch of research compounds is assayed for identity and purity by Janoshik Analytical, an independent laboratory, and the CREATREN product page says each CREATREN batch is assayed too. The Certificate of Analysis for a batch is sent on request: email the batch number printed on the label together with the product name. The process is set out on the lab tests page.

What a Janoshik assay is not

Be precise about what this proves. A laboratory assay reports what it measured in a batch. It is not a certification scheme for sport. UK Anti-Doping states that there is no guarantee any supplement is free from prohibited substances, that athletes are strictly liable for what is in their bodies, that neither WADA nor UKAD endorses supplement products, and that athletes should use batch-tested products and check the actual batch numbers (UKAD). A Janoshik assay is not the same as a sport-specific batch-testing certificate, so if you are subject to anti-doping rules, read the UKAD guidance first.

Questions to ask any seller

Ask whether a named, independent laboratory tests each batch, and whether you can see the certificate for your batch number.

UK food-supplement rules and health claims

What counts as a food supplement

The Food Supplements (England) Regulations 2003 define a food supplement as a food meant to supplement the normal diet, which is a concentrated source of a vitamin, mineral or other substance with a nutritional or physiological effect, and is sold in dose form. The definition of dose form includes capsules, tablets and sachets of powder, and other forms designed to be taken in measured small unit quantities (regulation 2, as originally made). Check the current text on legislation.gov.uk, because this link shows the regulation as originally made. These are the England regulations; Wales and Scotland have separate equivalent regulations that we have not reviewed here. In this article we describe the product as creatine powder sold as a food supplement.

GOV.UK guidance lists sports and fitness supplements such as protein powders and creatine among common types of food supplement. It says supplements should not be sold with medical-condition claims, that shoppers should check health claims against the Great Britain nutrition and health claims register, and that they should be careful when buying online from unknown sellers (GOV.UK).

The authorised creatine claims

The GB retained Regulation (EC) 432/2012 lists authorised health claims. For creatine, the first entry reads: creatine increases physical performance in successive bursts of short-term, high intensity exercise. The conditions are that the food provides a daily intake of 3 g of creatine, that the consumer is told the beneficial effect is obtained with a daily intake of 3 g, and that the claim targets adults performing high intensity exercise (Regulation 432/2012 annex). The source opinion is EFSA Journal 2011;9(7):2303.

A second entry covers adults over 55 who do regular resistance training, again tied to 3 g of creatine a day. The CREATREN page does not use that claim, so it is not discussed further here.

What is not on the list

We searched the annex for taurine and found no authorised taurine claim there, so a functional description of taurine, such as the one on the product page, is not one of the claims listed in that annex. This check covered the annex only, not the full GB register spreadsheet.

The UK Nutrition and Health Claims Committee published an opinion on 14 August 2024 on creatine and cognitive function. It concluded that a cause-and-effect relationship had not been established between consumption of 3 g or less a day of creatine and improved cognitive function in healthy adults, and stated that the opinion is not an authorisation or a positive safety assessment (UKNHCC). A 2024 meta-analysis of 16 randomised trials (492 adults, healthy people and patients with specific diseases) reported a positive effect on memory, but found no significant improvement in overall cognitive function or executive function and rated certainty as low for most outcomes other than memory (Xu et al., 2024). The committee's opinion did not establish that relationship, so this guide reports cognitive-function research only as study findings and makes no claim about it for any product.

What a claim does not mean

An authorised claim describes an effect under the stated conditions, and the conditions of use limit it to adults performing high intensity exercise. It does not describe what any product will do for you. Studies, such as a 2024 meta-analysis of 23 studies in adults under 50, found strength gains with creatine plus resistance training in males, while females showed no significant gains in that analysis, which included only two female-only studies and one mixed study (Wang et al., 2024). The authors described the upper-body difference between males and females as a trend (p = 0.067) and concluded that greater benefits were likely in males than females; the abstract reports 40 female participants in the two female-only studies and 9 in the mixed study. Our reading is that the small female sample limits what can be concluded.

How to order from Free Muscle

Free Muscle sells research compounds and gym apparel online, plus two food supplements, of which CREATREN is one. The research compounds are sold for laboratory research use only, to customers aged 18 or over, and are not medicines or food supplements. Each batch of CREATREN is assayed by Janoshik Analytical per its product page.

1. Choose the product. The CREATREN product page carries the directions and ingredients. You can also browse the wider performance nutrition collection.
2. Order before 2pm. Orders placed before 2pm UK time, Monday to Friday, are processed the same working day.
3. Delivery. UK delivery is free and tracked, in plain packaging. Standard UK delivery takes 2 to 5 working days. Full details are on the shipping information page.
4. Keep the batch number. It is printed on the tub. Email it with the product name to request the Certificate of Analysis.
5. Returns. Unopened items in their original packaging can be returned within 30 days. The terms are on the guarantee page, and apparel returns follow the refund policy.

Frequently asked questions

What is CREATREN?

Its product page describes it as a 300g tub of micronised creatine monohydrate with taurine, giving about 60 servings of 5g and containing two ingredients. It is sold as a food supplement.

How do I choose a creatine monohydrate product in the UK?

We cannot tell you which to prefer. Compare what you can verify: the named form, grams per serving, a short ingredient list, a batch number and a certificate from an independent laboratory. The checklist in the label section above works for any seller.

How much creatine is in each serving of CREATREN?

The product page does not state grams of creatine and taurine separately for a 5g serving. Check the label on the tub, or email the seller and ask. A 2021 expert review (Antonio et al., 2021) cites 3 to 5 g a day for creatine on its own, but that does not tell you what a mixed serving contains. Check the product label, and speak to a doctor or pharmacist if you have a medical condition, are pregnant or breastfeeding, or take medicines.

Does taurine add anything to creatine?

The honest answer is that it is not established. One small human study in the evidence reviewed for this guide gave both together: in 12 sports students, time to exhaustion in hot and humid conditions was higher with the combination than with placebo, while repeated-sprint measures did not differ between groups. Countermovement jump height fell after exhaustive exercise in the creatine and combination conditions (Yu et al., 2025). It was a single-blind crossover trial with 4 conditions, and the authors state that the combination did not significantly improve repeated sprint performance. Taurine alone has been reviewed in sport, and the authors concluded that limited and varied findings prevent firm conclusions (Kurtz et al., 2021). A 2025 meta-analysis of 23 randomised trials (N = 308) of single taurine doses found a small-to-moderate association with better overall performance (g = 0.25), but rated certainty low to very low and noted that prediction intervals often included the null (Deng et al., 2025).

What do UK rules say about creatine monohydrate labels, claims and testing?

Creatine monohydrate UK guidance starts from the fact that creatine is sold as a food supplement. GOV.UK guidance lists it among common food supplements and advises checking health claims against the Great Britain nutrition and health claims register (GOV.UK). The retained Regulation (EC) 432/2012 authorises a creatine claim on short-term, high intensity exercise, on the condition that the food provides a daily intake of 3 g of creatine (Regulation 432/2012 annex). The label section above lists what to look for, and the testing section explains what a batch certificate from an independent laboratory shows. Check the product label, and speak to a doctor or pharmacist if you have a medical condition, are pregnant or breastfeeding, or take medicines.

Is creatine regulated in the UK?

GOV.UK guidance lists creatine among the common types of food supplement and advises shoppers to check health claims against the Great Britain nutrition and health claims register (GOV.UK). The retained Regulation (EC) 432/2012 authorises a creatine claim on short-term, high intensity exercise, on the condition that the food provides a daily intake of 3 g of creatine, and a second claim for adults over 55 who do regular resistance training (Regulation 432/2012 annex). Check the product label, and speak to a doctor or pharmacist if you have a medical condition, are pregnant or breastfeeding, or take medicines.

Is a loading phase part of the research?

Trials differ in design, and some have used a higher initial intake (for example Lugaresi et al., 2013). That describes a study design, not guidance for you. Follow the label on your product and speak to a doctor or pharmacist if you have a medical condition, are pregnant or breastfeeding, or take medicines.

Does creatine cause hair loss?

A 12-week randomised, placebo-controlled trial in 45 resistance-trained men aged 18 to 40 (38 completed) found no significant differences in DHT, the DHT-to-testosterone ratio or hair growth measures between the creatine and placebo groups (Lak et al., 2025). It was a single trial in young men over a short period, so it does not settle every question.

What do studies report about body mass?

In a meta-analysis of 143 randomised controlled trials of creatine and body composition (the abstract does not describe the populations), supplementation was associated with a small average increase in body mass of 0.86 kg and in fat-free mass of 0.82 kg, with greater effects in studies that combined it with resistance training or used a maintenance dose (Pashayee-Khamene et al., 2024). Those are pooled averages, not a prediction for any individual.

Sources

1. 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;14:18. doi:10.1186/s12970-017-0173-z. PMID 28615996
2. Antonio J, Candow DG, Forbes SC, et al. Common questions and misconceptions about creatine supplementation: what does the scientific evidence really show? J Int Soc Sports Nutr. 2021;18(1):13. doi:10.1186/s12970-021-00412-w. PMID 33557850
3. Antonio J, Brown AF, Candow DG, et al. Part II. Common questions and misconceptions about creatine supplementation: what does the scientific evidence really show? J Int Soc Sports Nutr. 2025;22(1):2441760. doi:10.1080/15502783.2024.2441760. PMID 39720835
4. Andres S, Ziegenhagen R, Trefflich I, et al. Creatine and creatine forms intended for sports nutrition. Mol Nutr Food Res. 2017;61(6). doi:10.1002/mnfr.201600772. PMID 28019093
5. Longobardi I, Solis MY, Roschel H, Gualano B. A short review of the most common safety concerns regarding creatine ingestion. Front Nutr. 2025;12:1682746. doi:10.3389/fnut.2025.1682746. PMID 41404326
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7. Lugaresi R, Leme M, de Salles Painelli V, et al. Does long-term creatine supplementation impair kidney function in resistance-trained individuals consuming a high-protein diet? J Int Soc Sports Nutr. 2013;10(1):26. doi:10.1186/1550-2783-10-26. PMID 23680457
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10. Yu P, Fan Y, Wang X, Wu H. Effect of taurine combined with creatine on repeated sprinting ability after exhaustive exercise under hot and humid conditions. Sports Health. 2025;17(5):919-929. doi:10.1177/19417381251320095. PMID 39972259
11. Kurtz JA, VanDusseldorp TA, Doyle JA, Otis JS. Taurine in sports and exercise. J Int Soc Sports Nutr. 2021;18(1):39. doi:10.1186/s12970-021-00438-0. PMID 34039357
12. Deng H, Song T, Yin M, et al. Does one shot work? The acute impact of a single taurine dose on exercise performance: a meta-analytic review. Scand J Med Sci Sports. 2025;35(9):e70123. doi:10.1111/sms.70123. PMID 40852891
13. 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;11:1424972. doi:10.3389/fnut.2024.1424972. PMID 39070254
14. Wang Z, Qiu B, Li R, et al. Effects of creatine supplementation and resistance training on muscle strength gains in adults <50 years of age: a systematic review and meta-analysis. Nutrients. 2024;16(21). doi:10.3390/nu16213665. PMID 39519498
15. Lak M, Forbes SC, Ashtary-Larky D, et al. Does creatine cause hair loss? A 12-week randomized controlled trial. J Int Soc Sports Nutr. 2025;22(sup1):2495229. doi:10.1080/15502783.2025.2495229. PMID 40265319
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18. legislation.gov.uk. Regulation (EC) No 432/2012 annex (retained, Great Britain). Accessed 2 October 2026.
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