It’s probably individual, but the effects typically last around three to eight hours for me.
Superhuman Genius gives your brain a lot of growth potential, so it’s good to use before any brain related task to form new connections with that potential. You will form the most new connections in your brain in relation to what you’re using it for. You can also use it prior to listening to Permanent Brain Enhancement.
From the video description:
Its Good to use this before a brain related task, like studying, active learning, thinking/imagination.
@Philip_Weiss also had some great tips in this discussion thread.
Superhuman Genius should not be listened to more than twice in one day according to Dream’s instructions.
From the video description:
Use twice a day at most, do not use overnight. Do not overuse.
You could listen to it more often, but you may cause damage.