>>128776
If other people aren't experiencing the same, it means you are doing something wrong. That can be corrected by taking a different approach to studying. Seriously.
Speak with some professors, search the internet for study methods and approaches which use less time.
Also, If you have a couple of hours free at lunch, sleep for 15 minutes, it will make a difference.
Eat earlier in the even and study in two stages.
So, eat first thing, then study for 3 hours - you will do better than studying for 4 and eating late.
You need to improve your sleep quality, so follow the usual rules for that.
1. Eat 4 hours before bed at least, you can have half a sandwich later if you need it, 2 hours before bed.
2. avoid all screens for 2+ hours before bed. No phone, no computer, no tv. This is to avoid the blue light that affects your bio-rhythm.
3. spend some time outside around midday every day, for 15-30 minutes. can be a walk to somewhere, it keeps your internal clock regular.
4. room you sleep in should be absolutely dark and silent as possible. no mobile phone charger lights or anything, cover them with tape if necessary.
Identity the separate problems and find solutions for them separately. Then change one part and improve things step by step.
You need to take breaks between studying, or your mind will just go in loops and be inefficient.
Saturday morning should be fully off, outside or doing an activity where you can let go, a sport, or exercise. It will make your brain cleared and relaxed.
Eat the right foods, even changing by 25% what you eat will make a big difference.
Vitamins: B complex, magnesium, zinc, vitamin C, vitamin D3, fish oil. They will improve your sleep and concentration.