20g of creatine to boost cognition?

On an episode of Huberman Labs, guest Rhonda Patrick talks about creatine for cognition. When she's sleep deprived, she takes 20g of creatine, and says it helps (could be placebo effect, she says).

I looked up a specific paper that mentions this 20g figure. Interestingly, the paper is a review by the European Food Safety Authority, and it reviews 21 studies.

As the credo summary highlights, the review found:

Two studies suggested short-term working-memory benefits at 20 grams daily, but lower doses and longer use did not reproduce them.

Would be interesting to deep dive into those two studies!