Mental focus supplements - real or fake?

[nemo09]

I've been told to focus better, and decided to seach for supplements that enhance memory and focus. Products located include Focus Fast, Constant Focus, and Neurostin. All claim miracle results, but I also find negatives on all.

Is there a product that helps promote better memory and focus, or am I chasing unicorns?

 

[HmgGuy]

Many types of stimulants can improve focus, but all have risks, such as sleeping problems and rapid heartbeat.