I believe this is where I read about combining ginkgo biloba with creatine and its effects on working memory and raven progressive matrices
skip down to GASTNER ET AL 2007. The original paper is in German.
It claims working memory improved by 2.7 points by combining ginkgo and creatine (vs 0.4 points for placebo, 0.8 points for ginkgo biloba alone and 1.7 points for creatine alone)
Foe Raven’s Progressive Matrices improved by 7.9 points by combining ginkgo and creatine (vs 1.5 points for placebo, 3.1 points for ginkgo biloba alone and 4.6 points for creatine alone)
However the author of that webpage makes the following claim also
But Gastner et al reported only pre and post-test scores, and not standard deviations; nor was any kind of statistical test reported, making it difficult to infer anything about the results.
It is unclear where this experiment was done, by whom, or whether it was ever published. (The “in press” citation to Mielcarz et al 2007 turns out to refer to McMorris et al 2007.) Nothing in the English translation indicates that it was published anywhere else; searches failed to find anything related to this but the patent itself; the Uchida-Kraepelin test is unusual and I tried searching for anything relating to it and creatine in Google/Google-Scholar in English & German but turned up nothing besides discussions of Watanabe 2002.
On 2013-09-23, I attempted to reach Gastner via the Alzchem contact form. (Gastner knows English, as demonstrated by co-authoring “Creatine - its chemical synthesis, chemistry, and legal status” in Creatine and Creatine Kinase in Health and Disease .) 3 months later on 2013-12-14, I mailed a physical letter to the Trostberg, Germany address listed in Creatine and Creatine Kinase (“Degussa AG, Dr. Albert-Frank-Straße 32, D-83308 Trostberg, Germany”). As of 2015-01-08, I have received no responses to any of my attempts.
