EVIDENCE VS HYPE · CREATINE & PLANT DIETS
The hype: Vegetarians and vegans have less creatine, so supplements will give them much bigger gains than meat eaters.
There is a real physiological observation behind this claim: diet influences muscle creatine stores. But increasing the amount stored in a muscle is not automatically the same as improving strength, sprint performance or muscle growth. We investigated whether people eating plant-based diets actually benefit more from creatine monohydrate.
The short answer
Vegetarians often start with lower muscle creatine stores and may show a larger increase in those stores after supplementation. Evidence that they consistently gain more performance or muscle than omnivores remains limited. Creatine can be a reasonable optional supplement for relevant training goals; a plant-based diet does not make it compulsory.
Why people believe it
Meat and fish supply creatine. Plant foods supply little, although the body also makes creatine using amino acids. Someone avoiding meat therefore has a plausible reason to start with lower muscle stores. If there is more room to increase those stores, a larger response to supplementation seems possible.
The important question is what “response” means. A biochemical measurement, a short sprint and months of strength training are different outcomes. The strongest reasonable version of the claim is that vegetarian athletes receive a greater practical benefit than comparable omnivorous athletes at the same dose, with the same training. Establishing that requires a direct dietary-group comparison.
What the evidence says
The systematic review: storage changes are clearer than superior performance
Kaviani and colleagues' 2020 systematic review included 11 papers covering nine studies. Supplementation generally increased creatine-related stores in vegetarians, who often had lower initial levels. Some studies reported useful changes in exercise or body-composition outcomes. But comparisons with omnivores were inconsistent, and much of the research had moderate-to-high risk of bias.
The review concluded that vegetarians were likely to benefit, while greater performance improvement than omnivores was not established consistently. Many participants were not trained athletes. Small samples, different protocols and mixed definitions of vegetarian diets limited the inference. Read Kaviani et al., 2020, International Journal of Environmental Research and Public Health.
A direct comparison provides an interesting signal
Burke and colleagues' 2003 trial compared vegetarians and nonvegetarians during eight weeks of resistance training and creatine or placebo supplementation. Its outcomes included muscle creatine, body composition and exercise performance. This is more directly relevant than a trial studying only vegetarians because it can examine dietary-group differences.
The trial contributed to the hypothesis that lower initial stores can accompany a larger response. However, one small, older experiment cannot establish a universal rule across diets, sexes, training programmes or outcomes. Its findings belong within the mixed body of research described by the systematic review. Read Burke et al., 2003, Medicine & Science in Sports & Exercise.
A recent trial separates muscle stores from sprint performance
Bonne and colleagues' 2025 double-blind trial randomised 15 young adult vegans and vegetarians: seven received creatine monohydrate and eight placebo. For seven days, the creatine group took 0.3 g/kg/day divided into four portions. Muscle creatine increased, but peak and mean sprint power did not improve significantly relative to placebo.
This does not show that creatine never benefits plant-based athletes. Seven days cannot answer a months-long training question, and a study this small has limited power. There was also no omnivorous comparison group, so it cannot determine whether vegetarians benefit more. It demonstrates why a higher muscle creatine measurement should not be presented as guaranteed immediate performance improvement. Read Bonne et al., 2025, Physiological Reports.
The catch: dietary labels are blunt tools
“Vegetarian” can describe very different eating patterns. Duration of the diet, consumption of dairy and eggs, total energy, protein intake and past supplement use vary. Omnivores also differ in how much meat and fish they eat. Diet alone is therefore an imperfect way to predict a person's initial stores or response.
Lower average stores do not diagnose a disease or establish that a diet is inadequate. The body makes creatine, and the performance question is separate from whether someone meets nutritional needs. A supplement should not be sold through an invented deficiency label.
Comparisons also need equal training and adequate nutrition. If one group trains more, eats differently or starts at another level, it becomes harder to isolate dietary status as the reason for a response. Studies measuring water-sensitive lean mass should be interpreted alongside strength and longer-term outcomes.
Commercial influence deserves attention in supplement research, but funding alone neither proves nor disproves a result. Replication, transparent methods and a fair comparator matter. The accessible records reviewed here do not provide enough detail to classify every original trial as independently funded; no blanket independence claim is warranted.
How strong is the evidence?
What this means for you
Base the decision on your goals. Resistance training and repeated high-intensity activity are more relevant than the dietary label alone. If you do not want a supplement, a well-planned plant-based diet and progressive training can still support excellent performance. Creatine is not a replacement for sufficient food or protein.
If you choose to use it, plain creatine monohydrate is the research-supported starting point. Check ingredients and manufacturing information if vegan suitability matters; do not assume every capsule, flavouring or mixture is vegan. A transparent single-ingredient product makes it easier to know what you are taking. No particular brand is endorsed here.
Common research protocols use a loading phase followed by 3–5 g daily; a slower daily approach can also be used. The high weight-based dose in the seven-day trial is not a requirement for every vegetarian. The NIH's exercise-supplement guidance describes common protocols and notes that supplements cannot replace a nutritionally adequate diet. Read the NIH consumer fact sheet.
Initial scale-weight increases can include water. Track training and relevant performance rather than treating a heavier scale as proof of new muscle. If you have kidney disease, relevant medical conditions or medicines requiring monitoring, obtain individual advice before supplementing and disclose use when interpreting blood tests.
The Evidence vs Hype verdict
There is a sound reason to study creatine in people eating plant-based diets, and a reasonable case for optional use for relevant exercise goals. There is not yet a reliable basis for promising that vegetarians will gain more than meat eaters—or claiming that all vegans need creatine.
Research & Sources
- Kaviani et al. (2020). Systematic review of vegetarian versus omnivorous responses.
- Burke et al. (2003). Eight-week resistance-training trial.
- Bonne et al. (2025). Seven-day muscle-creatine and sprint trial.
- NIH Office of Dietary Supplements. Exercise and athletic performance fact sheet.
Evidence reviewed: October 2026. Editorial educational assessment, not individual medical advice or independent clinical peer review. Some original-study assessment relied on accessible abstracts and systematic-review reporting. No commercial product is endorsed; optional recommendations remain separate from research conclusions.