Many nootropic enthusiasts believe that PRL-8-53 is the most effective short-term memory enhancer available on the market. Only one human study has been conducted since it was patented 40 years ago therefore more tests are needed to confirm its safety and effectiveness.
CDP Choline is a naturally-occurring chemical that many nootropic users consider an essential part of every stack. Safe, powerful, and extremely well-tolerated, it's a memory enhancer and brain-protectant on its own and a powerful potentiator in combination with other supplements, particularly the racetams.
Sunifiram is an exciting new development in the world of nootropics. It is a derivative of piracetam, that appears to deliver similar memory, learning and mood enhancing benefits in a more powerful package.