One interesting study on petai mentioned that :-
"200 students at a Twickenham (Middlesex) school were helped through their exams this year by eating petai at breakfast, break, and lunch in a bid to boost their brain power. Research has shown that the potassium-packed fruit can assist learning by making pupils more alert"
You can read the full article here
However my own "research" on eating too much petai resulting to one negative espect....it will cause "unwanted" aroma in your...toilet !