Dr. Stacy Sims: Should women take creatine? A physiology-based masterclass for midlife hormones

Dr. Sims emphasizes that the traditional bodybuilding creatine protocol (20 g/day with carbs) is designed only for muscle performance, causing water retention and GI distress. In contrast, a woman-focused protocol saturates all fast-energetic tissues slowly, avoiding side effects. She points out that women have 70–80% lower creatine stores than men and eat less creatine-rich food, making supplementation more critical during hormonal transitions. The constant daily dose is necessary because creatine doesn't have an acute effect; it requires cumulative saturation. She references the ISSN position stand and emerging health research on creatineforhealth.com. She also notes that women can start low to avoid any fear of bloating, and that over weeks, the gut, brain, and muscle improvements become evident.

Dr. Sims cites studies showing that during sleep deprivation, individuals on a higher creatine dose (she mentions the effective dose as 5 g twice daily) maintain better cognitive focus and body composition. She references its use as an adjunct to SSRIs in depression, where 5 g twice daily helps pull women out of depressive episodes. This protocol is for acute periods, not lifelong, and works within the body's fast energetics framework.

She relates the host's experience of taking 10 g and feeling nauseous to the fact that a large bolus can overload the gut's fast energetics, causing distress. By starting small, the body accumulates creatine steadily, avoiding the nausea and bloating that can occur with a sudden surge. This approach addresses women's common fear of creatine side effects and improves adherence.

Dr. Sims details how the bodybuilding dose (20 g/day in divided doses with carbs) saturates muscles for performance and causes water retention, but that is not what women need. For health, a much lower dose over time saturates all fast-energetic tissues—brain, heart, gut, muscle—providing cognitive, mood, and gut benefits without water weight or gastric issues. She highlights that women store 70–80% less creatine than men and eat less creatine-rich food, making supplementation crucial, especially in perimenopause when estrogen fluctuations increase gut distress and brain fog. The ISSN position stand and the creatineforhealth website are now compiling evidence beyond muscle, shifting the narrative. She emphasizes that the daily low dose works for all tissues, not just on workout days.

She recounts living in New Zealand while her father was dying of cancer on the US East Coast, receiving middle-of-the-night calls that wrecked her sleep. Facing depressive episodes but not wanting to risk an SSRI during her PhD, she delved into research on brain energy metabolism. The brain’s high energetic demand relies on ATP and phosphocreatine; she reasoned that making creatine systemically available would benefit all tissues, including the brain. She later points to randomized controlled trials showing that women taking 3–5 g of creatine come out of depressive episodes faster than those on SSRIs alone, and that under severe fatigue, 5 g twice daily improves stress resilience and circadian rhythm reset.

Dr. Sims explains that the gut is a fast-energetic tissue; its mucosal lining requires creatine to maintain tight junctions. In perimenopause, estrogen fluctuations disconnect estrogen receptors, leading to increased intestinal permeability and distress. Supplementing creatine provides fuel to keep the mucosa intact under stress. She notes the 5:1 ratio of women to men experiencing GI distress while running, tied to both estrogen and mucosal integrity. By saturating tissues over three weeks with 3–5 g daily, the gut benefit kicks in, reducing the need to find a bathroom mid-run. This is a stark contrast to bodybuilding creatine protocols that never considered gut health.

Dr. Sims acknowledges the existence of one study showing a marginal increase in DHT but states clearly that there is no evidence of actual hair loss. She points out that women who start creatine in midlife often experience hair shedding due to progesterone fluctuations during perimenopause, and they erroneously attribute it to creatine. She clarifies that the low-dose, no-carbohydrate protocol recommended for women does not engage the same hormonal pathways that might be affected by bodybuilding doses. This myth-busting is critical because it removes a key psychological barrier to supplementation.