You can't reach effective quantities at normal intake, BUT you can't predict sidefx of megadosing unusual foods

Remember how herbal antifungals also just HAPPEN to generally be antimicrobial as well and tend to massacre your gut flora?

Any time you're taking a mix of hundreds of potentially active ingredients in any significant amount, you're risking some pretty crazy sidefx. Why? Simply put, you have NO CLUE what you're taking, since you're choosing foods with hundreds of chemicals on the basis of just one or two that you actually want. Coincidentally, these are sidefx NO ONE will warn you about, because no one has every bothered to study what might happen if you eat, for example, half a pound of parsley daily for a year... And if you're taking whatever you wanted to take at common dietary levels (say, 1 portion once per week), you're just not going to get the concentration of whatever vitamin/mineral/herbal antifungal you wanted.

...ever read about the bodybuilder who managed to do himself in by going on an 8-month tuna diet? Now, we think of tuna as a really healthy product, and it is. HOWEVER, eating huge portions of tuna 250 days in a row WILL *KILL* YOU - by mercury poisoning. And no, that does not mean that the occasional tuna steak will ever harm anyone. It's not that there's actually that much mercury in it - unless you start eating unnatural amount thereof...

And no, tuna's not alone like that, and neither is mercury the only thing you can overconsume when going crazy with some particular food for "natural supplementation". Iron, pesticides, Antibiotics , vitamin A, vitamin D, and lots of other crap can, in high dosages, accumulate in your body and then send you to meet whatever maker, reincarnation, eternal emptiness, or nothing whatsoever awaits us all...