Not Just About Muscle... What Creatine Is Really Doing For Women?
Ask most women what they know about creatine and you'll hear one of two things. Either "isn't that what bodybuilders take?" or "I don't want to bulk up." Both responses are understandable, because for decades creatine research was conducted almost exclusively on men, in gym settings, with muscle mass as the primary outcome. That framing stuck.
But the science has moved on, and the picture it's painting of creatine in women's health is far more interesting than just bro science. Brain function, mood, sleep, menstrual health, reproductive outcomes, perimenopause, creatine appears to have a meaningful role in all of it. And given that most women are already working from a deficit, I feel that the conversation about this miracle molecule needs even more attention.
Why Women Start on the back foot
Before getting into the benefits, it will help if I explain where we are starting from. Women naturally synthesise around 20% less creatine than men, and on average consume 30 to 40% less through diet, largely because creatine is found primarily in red meat and fish. For women who eat less of these foods, or who follow a vegetarian or plant-based diet, the gap becomes even wider.
What this means in practice is that many women are already operating with lower creatine stores before any question of supplementation arises. And creatine stores fluctuate across the menstrual cycle, with research suggesting they are influenced by oestrogen , which also explains why the deficit deepens as women approach perimenopause and oestrogen begins to decline. It starts at the cellular level, even before we discuss supplementation.
Yes, it's best know for its supporting role in muscle - but that's not the point!
To be clear: creatine does support muscle strength and lean body mass in women, and this is well evidenced. A 2025 study following perimenopausal and postmenopausal women taking 5g of creatine monohydrate daily alongside twice-weekly strength training over 14 weeks found meaningful improvements in lower-body strength and body composition. Given that women can lose up to 3% of muscle mass per year after menopause, I think this matters a great deal!
Muscle and Creatine go hand in hand - BUT your brain runs on creatine too!
The same mechanism that makes creatine useful in muscle tissue (producing and replenishing ATP, the body's primary energy), also operates in the brain, where energy demands are constant and high.
A 2024 systematic review and meta-analysis published in Frontiers in Nutrition, examining 16 randomised controlled trials across 492 participants, found that creatine supplementation significantly improved memory, attention and processing speed. When researchers broke the data down by sex, they stumbled across something interesting: the cognitive benefits were more pronounced in women than in men." The researchers noted this is likely connected to the lower baseline creatine stores women carry, meaning there is more room for supplementation to make a meaningful difference.
Note - If you have ever experienced the kind of brain fog that decreases mid-cycle, after a run of poor sleep or you're in the thick of perimenopause, this is worth paying attention to. The energy available to your brain is not fixed, it's influenced by what you're eating and how well your cells can produce and recycle ATP, and creatine plays a central role in that process.
Mood, Depression and Mental Health
This is perhaps the most surprising chapter in this creatine deep dive. A large population study found that adults who consumed more creatine through their diet had around 40% lower odds of experiencing depression, with the association being particularly strong in women. A separate clinical study found that creatine supplementation enhanced the response to antidepressant medication (SSRIs) in women with major depressive disorder. And another study in 2025 found that adding creatine to cognitive behavioural therapy (CBT) produced significantly greater improvements in depressive symptoms compared to CBT alone.
The mechanism under investigation relates to brain bioenergetics (how your cells make and use energy). When the brain cannot efficiently produce the energy it needs, neurotransmitter regulation, including dopamine and serotonin, can be affected. Creatine appears to support the cellular conditions in which healthy mood regulation becomes possible.
Note - It is worth noting that the evidence here is still developing and creatine is not a treatment for depression. But as part of a broader nutritional approach to mental wellbeing, the research data is building a compelling case.
Menstrual Health and Reproductive Function
A 2024 analysis of NHANES data (National Health and Nutrition Examination Survey in the US) covering over 3,000 US women found that those consuming adequate levels of creatine had significantly lower risks of irregular menstrual periods, obstetric conditions and pelvic pathology. Women with higher creatine stores were more likely to have regular, healthy cycles. This does makes biological sense as the ovaries, uterus and developing placenta are "creatine-hungry" tissues. Both eggs and sperm depend on creatine during maturation and fertilisation. As a practitioner, this is an area I feel passionately needs more research funding and attention, the implications for women in their reproductive years, whether navigating cycle irregularity or thinking about pregnancy are significant.
Peri-menopause and Beyond
As oestrogen declines, creatine metabolism is directly affected, compounding the deficit that many women may have carried throughout their adult lives. And the results often show up as accelerating muscle loss, declining bone density, worsening cognitive function, disrupted sleep and mood changes.
A 2025 randomised controlled trial of 36 perimenopausal and postmenopausal women found that eight weeks of creatine supplementation improved reaction time and significantly reduced the severity of mood swings. The 14-week study also found improvements in sleep quality, which is often one of the most impactful quality-of-life changes women report during this stage. Strength training is a passion of mine and I will never stop talking about what it does for women! So, it will come as no surprise that creatine and resistance training work better together. For women in perimenopause, this combination is not just about staying strong, it is about protecting your brain, your mood, your sleep and your long-term quality of life.
The most studied form is creatine monohydrate, at 3 to 5 grams per day. No loading phase needed and I want to be specific about why. The high-dose loading protocol that circulates in gym culture causes gastrointestinal distress and water retention in many women, which unsurprisingly puts them off before they ever experience the benefits. Slow and steady wins here. Same destination but a far more comfortable and enjoyable journey!
This is an area Dr Stacy Sims has championed for years, if you have read Next Level (I recommend picking up a copy) you will already have a sense of why creatine features so prominently in her recommendations for women in this life stage. The research is now firmly catching up with what she has been saying, and the clinical trials are beginning to confirm it.
The Macro
What the growing body of research on creatine in women points to is not a muscle supplement being repurposed. It is a recognition that women have a distinct creatine physiology that has been systematically under-studied, and that addressing a natural deficit has ripple effects across brain, body and hormonal health at every life stage.
This is not just about muscle. It never was.
If you would like to explore whether creatine is right for you and how it fits into a presonalised, precise nutrition strategy for you, this is exactly the kind of conversation I would love to have with you. Start leaning in, learning and levelling up to the person you are meant to be!
Get in touch to find out more.
References and Resources
Creatine Supplementation in Women's Health: A Lifespan Perspective — Nutrients, MDPI
Creatine and Cognition in Aging: A Systematic Review — Nutrition Reviews, Oxford Academic
Dietary Creatine and the Risk of Mental Health Conditions in the General Population — PMC, 2025
Creatine for Depression: Study Shows Promising Results — Healthline
Creatine Metabolism in Female Reproduction, Pregnancy and Newborn Health — PMC
Creatine for Peri and Postmenopausal Women: Why It Matters — Elizabeth Story MD
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