I am often very fatigued because of a medical condition and because of this I find it very hard to concentrate while studying, also because of my medical condition when I take caffeine it will make me sick, I've been told numerous times to take ginkgo biloba to improve my cognitive function, I've done plenty of research and it has very good reviews! But does anyone know how it works? For example does it work like caffeine where it gives you improved focus, energy etc just after taking it, or do you have to keep taking it daily to build up. Also if anyone knows what dose should I take if I want it to work instantly
...or just paranoid?