Creatine can increase growth hormone levels at rest, but the effect is limited and context-dependent. One study found that a high loading dose of creatine boosted resting growth hormone by an average of 83% compared to a control test. However, creatine does not appear to amplify the growth hormone spike you already get from exercise, and the resting increase varies wildly from person to person. The practical significance of this hormonal bump is debatable.
What the Research Actually Shows
The key study on this topic, published in the Journal of Clinical Endocrinology and Metabolism, measured growth hormone levels after subjects ingested a high loading dose of creatine at rest. Growth hormone rose significantly in every participant, averaging 83% above baseline. But the standard deviation was 45%, meaning some people saw a large spike while others experienced a modest one. The researchers noted that creatine at high doses mimicked the growth hormone response normally triggered by intense exercise.
That sounds impressive on paper. An 83% increase is a real, measurable change. But there are important caveats. This was observed at rest, using loading-phase doses (typically 20 grams per day split into multiple servings), not the standard maintenance dose of 3 to 5 grams most people take daily. And the spike was acute, meaning it was a temporary pulse rather than a sustained elevation.
Creatine Doesn’t Boost Growth Hormone During Exercise
Here’s where the picture gets more complicated. When researchers tested whether creatine supplementation amplifies the growth hormone response to resistance training, the answer was no. A study examining short-term creatine use alongside heavy resistance exercise found that the exercise-induced spike in growth hormone was identical whether participants took creatine or a placebo. The same held true for testosterone and cortisol. Creatine simply did not change the hormonal response to lifting weights.
This matters because most people taking creatine are also training. If creatine only raises growth hormone at rest but adds nothing on top of what exercise already does, the hormonal effect becomes less relevant to your gym results. Exercise itself is a powerful stimulus for growth hormone release, and creatine doesn’t stack on top of it.
Why the Growth Hormone Spike Likely Doesn’t Matter
Transient hormonal spikes from supplements or exercise are not the same as chronically elevated hormone levels. Your body releases growth hormone in pulses throughout the day, especially during deep sleep and intense physical activity. A temporary bump from creatine, even an 83% increase, falls within the range of normal fluctuation and is unlikely to drive additional muscle growth on its own.
The broader sports science literature has increasingly shown that acute, exercise-induced hormonal spikes (in growth hormone, testosterone, or both) don’t correlate well with long-term muscle protein synthesis or hypertrophy. In other words, a short-lived rise in growth hormone after taking creatine is not the mechanism through which creatine helps you build muscle. Creatine works through other, better-established pathways.
How Creatine Actually Supports Muscle Growth
Creatine’s real benefits come from its role in energy production. It increases the availability of phosphocreatine in your muscles, which helps regenerate the fuel your cells burn during short, high-intensity efforts like heavy lifts or sprints. This allows you to squeeze out more reps, recover faster between sets, and train at a higher volume over time. That additional training stimulus is what drives muscle growth.
There’s also an interesting hormonal connection that has nothing to do with growth hormone directly. One study found that creatine supplementation during resistance training increased intramuscular levels of IGF-1 (a growth factor closely linked to muscle repair and growth) by 78%, compared to 54% with training alone. Unlike the transient growth hormone spike, this IGF-1 increase was measured inside the muscle tissue itself, where it can directly influence protein synthesis and cell growth. This local effect is more likely to contribute to actual muscle development than a brief rise in circulating growth hormone.
The Bottom Line on Creatine and Growth Hormone
Creatine does cause a measurable increase in growth hormone at rest when taken at high loading doses. But it doesn’t amplify the growth hormone response during exercise, the spike is temporary, individual responses vary significantly, and transient hormonal pulses are not a reliable driver of muscle growth. If you’re taking creatine hoping it will meaningfully raise your growth hormone levels in a way that builds more muscle, the evidence doesn’t support that expectation.
Creatine remains one of the most well-supported supplements for strength and performance, backed by the International Society of Sports Nutrition as safe and effective. Its benefits just come from improving your energy systems and training capacity, not from acting as a hormone booster.