However, based on the relationship of excess dietary methionine to
vital organ toxicity, as well as its likely mechanism of action through increases in free radical generation, the possibility exists that the protective effects of plant - based diets can be due, at least in part, to their lower methionine content.
The idea that the protective effect is not due to any of the [individual plant food] components, but to a [synergistic] «combined effect» is gaining acceptance... However, based on the relationship of excess dietary methionine with
toxicity to major
vital organs, and its likely mechanism of action through increases in [free radical] generation, the possibility exists that the protective effects of [plant - based] diets can be due, at least in part, to their lower methionine content.»