Mental clarity: 10 foods to help boost your concentration
Coffee (dose dependent)
It's no secret that the caffeine in your regular cup of coffee goes some way towards improving your concentration - but contrary to popular belief, you won't get added benefit if you chug down four or even five coffees. This is because caffeine has an ideal balance point in the body, where if you ingest too much you'll be unable to sleep, you'll fidget, and you'll be less productive overall. For best effect, stick to one or two cups a day with a maximum caffeine level of around 300 mg.
Read more at http://coach.nine.com.au/2016/07/11/10/27/10-foods-to-help-boost-your-concentration#5Icbe2XDj7qvr3dl.99