[slipnslider]

Yep. From what I read mental fatigue (mental math problems is what the study used) or sleep deprivation are two scenarios in which creatine boosted cognition and memory.

Here are the sleep deprivation studies

https://www.nature.com/articles/s41598-024-54249-9

https://pubmed.ncbi.nlm.nih.gov/16416332/