Citicoline, sometimes referred to as CDP-Choline, is similar to Alpha GPC in terms of its ability to cross the blood-brain-barrier, but has been studied primarily as a cognitive enhancement supplement.
Unlike most supplements which claim to make you smarter, Citicoline has actually been shown to enhance aspects of cognitive function in perfectly healthy people. In fact, it's actually the only source of Choline which has been shown to do so.
This is in contrast to most "Nootropics" which tend to only work in old people with some form of mental deteroriation ocurring.
Alpha GPC is a cholinergic compound which may improve cognitive function and enhance exercise performance....
Ashwagandha is one of the most extensively researched, versatile adaptogen that we know of today....
Creatine is considered one of safest, most reliable supplements for building muscle.