Benefits of being an omnivore

I've always heard that the main benefit of being an omnivore is a greater variety of food, and therefore a more diverse source of nutrition, and there is probably also a lot of benefit in having a large number of food sources to fall back on if one becomes scarce, but I think there's another benefit as well, and one that others may not of thought of yet.  A lot of foods have some low-level toxins that, if eaten in large quantities may cause problems.  By eating a lot of different types of foods, you're getting a larger variety of toxins, but you're getting less of each type of toxin relative to the total amount of nutrition your taking in, so that no one toxin is accumulated in enough quantity to do you any harm.

(I know, not the most interesting or relevant post in the world, but I just thought it was an interesting idea.)