Overall, it is safe to say that radiation encountered at doses typical for a Mars mission is not prohibitively high to render the food supply inadequate given than space radiation at equivalent doses acts like gamma or electron bean radiation sources. However, research would be necessary to understand how actual space radiation, not just electron or gamma radiation, affects food in order to better predict and prepare countermeasures to these effects. Currently, there are no studies that have examined the effects of space radiation on food or how this type of radiation differs from more conventional types used for safety.
[Ed. note: added to Task Book in September 2009.]