Well, a lot of "natural" stuff isn't necessarily good for you. Nutmeg comes to mind right off the bat. I understand garlic in large quantities isn't, either. And some have a bounce-back reaction. St. John's Wort is a good one-day mood elevator, but if I take it for more than two days, I feel slightly depressed on that next day without it. (I don't mean "clinically" depressed by any means... just with less of my normal mental bounciness.)
Three milligrams of Melatonin, while it helps with sleep, can also give me a similar slight depression the next day (and affects my eyesight, I believe, but cannot confirm this.) One mg is enough to drowsify me.
Aspirin? Originally discovered in the bark of a tree (how natural!), it can make your ears ring. Why? It's an ototoxin.
Hell, why do you think so many doctors advise their patients to lay off the table salt? That's as natural as natural can be!
Oh, and that MSG or however they disguise its name this week, have it late in the day and you won't be able to sleep. Happened to me last night.
Something I ate yesterday must have been loaded with glutamates. I believe it was the fried chicken I had from the supermarket deli. Delicious, but they must have loaded the wonderully crunchy coating with MSG as a flavor enhancer, and they don't list the ingredients anywhere, like they do with packaged products.
So I get fairly conservative about food additives and supplements. This is one area where "if a little is good, a lot must be better" can be outright dangerous.
Like putting eight quarts of oil in a little four-banger engine.
"Muscle Milk" headache. Heh. Like the old Henny Youngman joke, "Doc, it hurts when I do this."
"Then stop doing that, my boy."
Terry
REF:
http://www.funny2.com/henny.htm