Should YOU take Creatine? | Dr. Stacy Sims

Stacy distinguishes between low-dose and high-dose creatine usage. The 3–5 g/day range is the sweet spot for everyday cognition and muscle performance. She stresses that at this dosage, the common fear of water retention—especially among women—is unfounded. This dose is also enough to provide brain-benefits under mild fatigue and to support gut integrity. She references the ISSN position stand and the creatineforhealth website as resources that validate these dosing guidelines and safety.

Stacy references a body of evidence showing that under severe sleep deprivation, creatine at these high doses can reset circadian rhythm and preserve cognitive function. She connects this directly to her own situation—late-night phone calls about her father’s health—where such support would have been useful. This is not a maintenance dose but a strategic intervention for temporary extreme stress.

Stacy describes living in New Zealand while her father was dying of cancer in the US, receiving middle-of-the-night calls that shattered her sleep. She feared the unknown effects of an SSRI on her PhD work and instead turned to the literature on creatine. She found a compelling picture: the brain is a highly energetic organ dependent on rapid ATP turnover, and creatine provided system-wide tissue support. She then walks through a cascade of newer evidence—randomized controlled trials on mood and anxiety, data on circadian reset under fatigue at doses of ~3 g per kg bodyweight (roughly 20 g for many adults), and benefits for gut mucosal integrity that reduce IBS symptoms. Even lower doses (3–5 g) now show cognitive and muscle improvements by enhancing fuel availability. She also notes the application in pregnancy, one of the most metabolically demanding states, and for sarcopenia and general fatigue. Throughout, she frames the narrative as a shift from a performance scope to a whole-health scope.