Here is a thread that might be of some relevance:
I have played with my diet a little bit, but I have found that the best way to improve your abilities is simply to practice them. Getting the right nutrients and shit your body needs is important for it to run optimally. So paying attention to your diet, and what you put in your body IS important, you will see a steady improvement in your overall wellbeing (and therefor abilities) because you are being ‘healthier’.
There is no shortcut or superfood out there that is going to blast open your psychic facilities.
Be mindful that the monks mentioned in the above posts did a heck of a lot more than play with their diet to achieve what they did. They had training regimes and prayer and faith and focused willpower, and lots of other things I can’t think off of the top of my head their life was basically dedicated to their craft, and that kind of commitment is hard to come by nowadays with our busy attention-grabbing techno life.