[removed]
/r/nootropics
Ginkgo biloba and omega 3 (DHA/EPA not ALA) have the most evidence for their memory efficacy. Nootropics are not magic and for the most part require chronic administration over months to be effective.
The nootropics that are immediately effective are mostly prescription only, mostly used to treat ADHD.
Caffeine might be your best bet :)
Complex carbs. Any long sustained energy food. Glucose right before a class can help with focus, if it’s shorter than 4 hours long, to avoid any crash. Fruit, vegetables. Breakfast cereals are good, they provide extremely high nutrients for their calories, if you have morning classes. A bit of fats can help for nutrient absorption.