Actually, the Dream actually performed better when he fasted. I read somewhere that when it was the month of Ramadan, David Robinson loathed playing against him especially during that month because be played extra hard.
I've tried to do the Master Cleanse, aka Lemonade Diet a few times but can't handle the initial hunger/caffeine withdrawal issues. Supposed to be great, though.
I think Hakeem won Player of the Month during February 1995, which was during Ramadan. Averaged 29.5 points, 10.1 rebounds, 4 assists, and 3 blocks.