Sure it's abundant. But, it is so tightly chemically bound in nature that it is not generally bio-assimilated.
However, when it is refined in its pure state by a very unnatural method, it exists in a very unstable form that can dissolve into food and drink when there is a sight acid or alkaline condition.
Case in point, put some tomato sauce in aluminum foil and watch what happens.
Bear in mind, aluminum was not used with food and drink products until after WWII. I believe that my grandmother died of Alzheimer's. She had all the symptoms. They just didn't have a name for it. She drank coffee, an acidic solution, from an aluminum coffee pot for as long as I can remember.