Ranging from such commercial products as DHEA, human-growth hormone, melatonin and antioxidants to homemade elixirs and organ extracts, the allure is to preserve youth, vitality and a keen mind. Some brain cells combine these ingredients to make acetylcholine for your brain cells to communicate and remember with.
More acetylcholine means more memory available since more cells are connected by acetylcholine.
While it may be true that certain naturally occurring compounds are important for memory functioning, it is not true that we can improve memory by simply ingesting more of them.