Strawberries may boost astronaut performance
Frozen fruit protects rats' brains from harmful rays.
10 November 2003
http://www.nature.com/nsu/031110/031110-1.html
"If active ingredients can be identified, they could be synthesized and given to astronauts in tablet form."
I dunno who's brilliant idea this is (I'm guessing an NSU editor) but why not just send the fruit itself? These effects can usually be attributed to a synergistic effect of the whole fruit rather than a few key chemicals.