Does Heat Destroy Creatine?
This is the most common concern. Creatine monohydrate is stable in hot water for short periods. A cup of coffee is typically 80–90°C. Research shows that creatine does not meaningfully degrade at these temperatures when exposure is brief (under a few minutes).
Where heat becomes an issue: storing a creatine solution in heat for hours. If you mix creatine in water and leave it in a warm place, it gradually converts to creatinine (the inactive byproduct). Making your creatine coffee and drinking it right away is completely fine.
Does Caffeine Block Creatine?
This is the bigger concern. It comes from a 1996 study (Vandenberghe et al.) that found caffeine completely blocked creatine's ergogenic effects in muscle relaxation time. The study used high caffeine doses (5mg/kg/day — equivalent to ~350mg for a 70kg person) every day for 3 days.
However, multiple subsequent studies failed to replicate this antagonism. In most real-world conditions — one cup of coffee, moderate caffeine intake — there's no evidence that caffeine cancels creatine. The mechanism proposed (phosphocreatine resynthesis interference) hasn't held up in follow-up trials.
The current consensus: moderate daily caffeine intake (1–2 cups of coffee) does not meaningfully interfere with creatine's benefits.
Practical Recommendation
Feel free to add 5g of creatine to your morning coffee. It won't dissolve as quickly as in cold water (the particles are denser), so stir thoroughly. The taste is neutral — creatine monohydrate is essentially flavorless.
If you're taking very high caffeine doses (300mg+), consider taking creatine at a different time — not because of strong evidence, but as a precaution based on the limited conflicting data.
Hot Coffee vs. Cold Water: Which Dissolves Better?
Counterintuitively, hot water dissolves creatine faster and more completely than cold water. Standard creatine powder has limited solubility (approximately 14g per liter at room temperature, higher when heated). Hot coffee dissolves it quickly — just stir and drink.
- Vandenberghe K et al. (1996). Caffeine counteracts the ergogenic action of muscle creatine loading. Journal of Applied Physiology.
- Hespel P et al. (2002). Opposite actions of caffeine and creatine on muscle relaxation time in humans. Journal of Applied Physiology.
- Doherty M et al. (2002). Caffeine is ergogenic after supplementation with creatine monohydrate. Medicine & Science in Sports & Exercise.