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Published Feb 3, 2025

Creatine questions and misconceptions | Simon Hill, Msc, Bsc

Simon Hill debunks common misconceptions about creatine supplementation, emphasizing the importance of consistency over timing, and explores its scientifically-backed benefits, including its effects on blood pressure and fertility, while clarifying the role of co-supplements.
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  • Blood Pressure

    Simon Hill examines the potential effects of creatine on blood pressure, addressing common concerns. He highlights that while creatine monohydrate can cause water retention, it primarily occurs within muscle cells, which is thought to enhance exercise performance and muscle tone. Despite hypotheses suggesting creatine might increase blood pressure, studies involving healthy adults and those with cardiovascular conditions show no significant impact on blood pressure from creatine supplementation at doses of 10 to 20 grams per day 1.

    The best evidence that we have, which includes human randomized controlled trial data involving two years of creatine supplementation, suggests that creatine taken at doses in the ballpark of 10 to 20 grams per day does not significantly affect blood pressure.

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    Hill notes the absence of studies on individuals with pre-existing hypertension, leaving a gap in the research 1.

       

    Urine Output

    The discussion on creatine's impact on urine production reveals common misconceptions. Hill clarifies that increased bathroom visits are often due to higher fluid intake rather than creatine itself 2. He emphasizes the importance of controlled studies to differentiate between personal experiences and scientific evidence.

    Your more frequent visits to the bathroom are likely explained by the fact that your daily fluid intake has gone up.

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    Hill underscores the need for humility and scientific rigor when evaluating the effects of supplements like creatine 2.

       

    Fertility

    Hill explores the potential impact of creatine on male fertility and its safety during pregnancy. He notes that while animal studies suggest creatine might improve semen quality, human data is limited to observational studies indicating higher semen concentration in creatine users 3. Hill advises caution with creatine use during pregnancy due to the lack of human trials.

    There is a current hypothesis that creatine supplementation, especially in the context of restoring semen creatine levels, may actually improve semen quality and potentially male fertility.

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    He suggests avoiding creatine during pregnancy until more conclusive research is available 3.

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