If you eat vegetarian or vegan, you have probably heard the argument: plants contain very little creatine, so taking it must be especially good for your brain. The first part helps explain the research question. The second part is a conclusion that still needs testing.
A larger cognitive benefit for vegetarians has not been consistently demonstrated. There are encouraging older findings, but a newer trial did not reproduce a greater response in vegetarians. You can take the question seriously without treating your dietary preference as evidence that something is wrong with your brain.
Less dietary creatine does not mean the same thing in every tissue
Creatine is obtained from some animal foods and is also made by the body. A 2020 systematic review found that vegetarians commonly had lower creatine concentrations in blood and certain muscles. The limited brain measurements reviewed did not show the same pattern: two studies found similar brain creatine or phosphocreatine concentrations between dietary groups. [1]
That distinction matters. “Vegetarians have less creatine” is too broad when it quietly turns a muscle finding into a brain claim. The review also judged much of the supplementation literature to have moderate or high risk of bias. It is useful context, not a final verdict on every vegetarian's needs. [1]
The older result that helped create the idea
Benton and Donohoe tested young women given creatine or placebo for five days. They reported a dietary-group difference on a word-recall task, with vegetarians performing better than meat-eaters after creatine. Verbal fluency and sustained attention did not improve with supplementation. [2]
There are reasons to read beyond the abstract. The methods describe 121 participants, while the abstract says 128. The discussion notes that recall generally worsened on the second test, and the result was not a simple demonstration that every vegetarian gained better memory. The trial was also brief and restricted to young women. It cannot establish a lasting, broad cognitive advantage across all vegetarian or vegan adults. [2]
A newer direct comparison did not confirm a bigger benefit
In a 2023 preregistered crossover trial, 123 healthy adults—approximately half vegetarian—took creatine and placebo for six weeks each. The researchers tested reasoning and working memory as primary outcomes and included further exploratory tasks. Vegetarians did not respond more favourably than omnivores. [3]
The overall results left open a possible small effect, especially on working memory, but did not establish a dependable improvement across cognition. Neither primary comparison crossed the conventional significance threshold. The study does not prove that no vegetarian could ever benefit; it does weaken the confident claim that vegetarian status predicts a larger cognitive response. [3]
Different test tasks, doses and study durations help explain why studies are not interchangeable. They also make it inappropriate to select the most flattering result and present it as settled advice.
Separate three decisions that marketing often combines
| The question | What would answer it? |
|---|---|
| Does my diet cover essential nutrients? | A review of the foods, fortified products and supplements you actually use. |
| Could creatine support my training goal? | Evidence about the relevant exercise outcome, alongside your programme and preferences. |
| Will creatine improve my thinking more because I am vegetarian? | Consistent direct evidence comparing cognitive responses across dietary groups. That is not currently established. |
These questions deserve separate answers. Creatine is not a substitute for vitamin B12, and a protein-rich meal is not automatically a complete plan for every micronutrient. The NHS identifies B12 and other nutrients that need particular attention in vegan eating, while explaining that a varied, well-planned vegan diet can meet nutritional needs with appropriate fortified foods and supplements. [4]
A practical starting point for a plant-based week
Use a few meals you already like as the foundation. For example, lentil tomato pasta, a chickpea wrap and tofu with rice and vegetables can become repeatable options. These are meal ideas, not nutritionally complete prescriptions or meals tested in the creatine trials. Adjust ingredients and portions to your appetite, allergies and needs.
Then check the details that are easy to overlook. Is your usual plant drink fortified? Do you have a reliable B12 source? The NHS lists fortified cereals, fortified soya drinks and fortified yeast products among vegan B12 sources, and notes that supplementation may be needed. Read the actual label rather than assuming that every version contains the same nutrients. [4]
If time is the barrier, choose a convenient component: tinned pulses, frozen vegetables or a meal cooked in enough quantity for another day. If cost is the barrier, compare portions you will actually eat rather than buying a product because its packaging looks more health-focused. Our flexible lunch guide shows how overlapping ingredients can become different meals.
For a vegetarian diet that includes eggs or dairy, the food choices differ from a fully vegan pattern. Avoid copying a checklist intended for another diet without considering what you already eat. If you are unsure about nutritional adequacy, a registered dietitian can help turn the broad guidance into a suitable plan.
Keep the optional choice optional
If your main reason for buying creatine is a promised mental advantage specifically for vegetarians, the current evidence does not make that a predictable outcome. If your reason is strength training, assess it on that basis: our strength-focused guide covers that different question.
You do not need to defend your dietary choice by buying every product aimed at it. A useful plan fits your preferences, budget and routine. Explore WeightStart's nutrition and training offer if you want structured support, and judge the service by what it actually includes rather than by an unproven cognitive promise.
Sources and reading notes
Updated 2 October 2026. The practical meal examples are editorial suggestions. The 2020 review includes earlier studies and is not independent confirmation of each trial it discusses. Future direct dietary-group comparisons may change the conclusion.
- Kaviani M, Shaw K, Chilibeck PD. Benefits of Creatine Supplementation for Vegetarians Compared to Omnivorous Athletes: A Systematic Review. International Journal of Environmental Research and Public Health. 2020;17:3041. doi:10.3390/ijerph17093041. Tissue measurements and review limitations assessed.
- Benton D, Donohoe R. The influence of creatine supplementation on the cognitive functioning of vegetarians and omnivores. British Journal of Nutrition. 2011;105:1100–1105. doi:10.1017/S0007114510004733. Full text assessed; sample-size discrepancy noted above. Supplements donated by Wander Limited; authors reported no financial interest in creatine sales.
- Sandkühler JF, Kersting X, Faust A, et al. The effects of creatine supplementation on cognitive performance—a randomised controlled study. BMC Medicine. 2023;21:440. doi:10.1186/s12916-023-03146-5.
- NHS. The vegan diet. Reviewed 5 June 2026. Public nutrition guidance, not a creatine trial.