Does Creatine Cause Anxiety?
The claim that creatine causes anxiety is a myth not supported by any scientific evidence. No clinical study has demonstrated a causal link between creatine supplementation and increased anxiety symptoms.
In fact, the emerging body of research on creatine and brain function suggests the opposite — creatine may support mental health rather than harm it.
The Origin of the Myth
The anxiety-creatine myth likely arises from several sources:
General supplement anxiety. Many people experience anxiety when starting any new supplement, driven by concerns about potential side effects.
This nocebo effect — where negative expectations produce negative experiences — is well-documented in clinical research.
Caffeine confounding. Creatine is frequently used alongside caffeine (pre-workout supplements, energy drinks). Caffeine is a well-established anxiety trigger, and users may incorrectly attribute caffeine-induced anxiety to creatine.
Water retention and body image. Creatine can cause initial water weight gain of 1-2 kg, which may trigger anxiety in individuals with body image concerns.
The anxiety stems from the weight change, not from a pharmacological effect of creatine.
Training intensity changes. Starting creatine often coincides with increased training intensity, which can affect cortisol levels and sleep patterns — both of which influence anxiety.
What the Science Says
Research on creatine and brain function actually points to potential mental health benefits:
Brain energy metabolism. The brain consumes approximately 20% of the body’s total energy despite comprising only 2% of body mass.
Creatine plays a vital role in maintaining brain ATP levels, particularly under stress or cognitive demand (Rawson & Venezia, 2011) .
Stress resilience. Preliminary studies suggest that creatine supplementation may enhance cognitive performance under stressful conditions such as sleep deprivation, hypoxia, and mental fatigue — conditions that also worsen anxiety.
No anxiogenic mechanisms. Creatine does not interact with neurotransmitter systems typically involved in anxiety (GABA, serotonin, norepinephrine).
It has no known mechanism by which it could induce anxiety.
Safety data. The ISSN Position Stand, reviewing over 500 studies, does not list anxiety as a reported side effect of creatine supplementation (Kreider et al., 2017) .
If You Experience Anxiety While Taking Creatine
If you notice anxiety symptoms after starting creatine, consider these more likely explanations:
- Check your caffeine intake. Have you increased pre-workout supplement use, coffee, or energy drink consumption?
- Assess training changes. Overtraining and insufficient recovery can elevate cortisol and trigger anxiety
- Evaluate sleep quality. Changes to training schedule or supplement timing can disrupt sleep, a major anxiety contributor
- Consider life stressors. Correlation does not equal causation — other life factors may be responsible
- Review all supplements. Some pre-workout ingredients (yohimbine, excessive stimulants) are known to cause anxiety
The Bottom Line
Creatine does not cause anxiety.
No scientific evidence supports this claim, and creatine has no known mechanism for inducing anxiety symptoms.
Emerging research suggests creatine may actually support brain function under stress.
If you experience anxiety while taking creatine, investigate other contributing factors such as caffeine intake, training intensity, sleep quality, and life stressors.
Creatine remains safe for individuals with anxiety disorders at standard doses of 3-5g daily.
Sources & References
This article draws on the ISSN Position Stand (Kreider et al., 2017) and Rawson & Venezia (2011) review of creatine and brain function.
Full citations are available in our Research Library.