First of all if you are stressed while studying then your Brain has to deal with stress obviously at that time it can't remember everything hence reduce the stress that you are taking in order to memorize also follow the steps below 1. Eat healthy and clean diet 2. Avoid sugars 3. Meditate for 15 min everyday 4. Exercise for 30 min everyday 5. Eat almonds and good fats like flaxseed avacado and Salmon fish to enable your brain to get the nutrition. 6. Most importantly avoid stress at all costs.