Brain Diet - sgml/signature GitHub Wiki https://www.ncbi.nlm.nih.gov/pubmed/9626151 https://en.wikipedia.org/wiki/Dehydroepiandrosterone https://www.scientificamerican.com/article/thinking-hard-calories/ https://www.sciencedaily.com/releases/2011/04/110419101234.htm https://www.ibstales.com/peppermint-oil.htm