(with apologies if the link states this; I haven't read it)
In plain terms, think dark, leafy greens, at the top of the list. Romaine also...etc. etc. And, as always, NOT isolated substances! (This is why finding to find a "cure" (or single substances) for cancer is so ludicrous--The answer is plainly under our noses--it's about synergy: whole foods, well grown, good stewardship of the land, care for one another. It's all connected--but a good place to start is with a plant-based diet.
If you can't afford organic (and by the way, at the least, no one should eat non-organic potatoes these days; the newer pesticides affecting them by travel miles and miles, underground, and are concentrated IN the potatoes), then look into a bentonite clay slurry, a spoonful added to soak water, and throw your veg. into a big pot. Let the bentonite's unique properties draw toxins from the produce. Rinse well.
Reaserch.One good place is on the Natural Healing forum, here on CZ. Enter your search terms, and scan the pages returned to you. Or start with the R'd (RR, RN and RRR)posts.
It is SO much easier than we've all been conditioned to believe! To get wall, you have to be healthy!!! Whole foods, make you healthy. De-Natured foods (almost everything that is NOT whole foods) does the opposite.
And add to that "whole thinking", and opposed to the other kind--which is all self-focussed, separated, and lonely. With genuine wellness comes the ability to conceive of others as simply a part of yourelf--no more 'stranger' to "you" than your fingers, or your toes.