Safety Profile
Overall safety rating: Generally Safe
Creatine (Brain Health) Side Effects & Safety
This content is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any supplement. Full disclaimer
Potential Side Effects
- One of the most extensively safety-tested supplements — no serious adverse effects in healthy adults
- Mild water retention (1-2 lbs, primarily intracellular)
- Rare: digestive discomfort at higher single doses (split if needed)
- Does not cause kidney damage in healthy individuals (extensively debunked myth)
- May cause mild weight gain from water retention
Drug & Supplement Interactions
- Nephrotoxic medications — use creatine with caution if taking drugs that affect kidney function
- Caffeine — early research suggested caffeine blunts creatine loading; more recent studies show minimal interaction at moderate caffeine doses
- NSAIDs — theoretical concern for combined kidney stress, though not demonstrated clinically
Maximum Dose
Do not exceed: 5g/day for cognitive purposes (higher doses do not provide additional brain benefit)
References
- Rae C, Digney AL, McEwan SR, Bates TC (2003). Oral creatine monohydrate supplementation improves brain performance: a double-blind, placebo-controlled, cross-over trial. Proceedings of the Royal Society B. DOI PubMed
- McMorris T, Harris RC, Swain J, et al. (2006). Effect of creatine supplementation and sleep deprivation, with mild exercise, on cognitive and psychomotor performance, mood state, and plasma concentrations of catecholamines and cortisol. Psychopharmacology. DOI PubMed
- Avgerinos KI, Spyrou N, Bougioukas KI, Kapogiannis D (2018). Effects of creatine supplementation on cognitive function of healthy individuals: a systematic review of randomized controlled trials. Experimental Gerontology. DOI PubMed