This metal is the first in abundance after iron, thus you could expect numerous things being made of it and also those for kitchen like pans, recipients, tools and more. Drink cans, aluminum paper that directly touches food. So there's a chance to the aluminum for entering the organism this way, but also multiple aliments do have traceable rests of aluminum.
Some sources consider the metal toxic for dietary purposes, although if this is true billions of individuals would be intoxicated with it. The metal has a daily incoming rate to the organism up to 10mg or more. As it's also the third element in abundance after oxygen and silicon, aluminum is very hard to get rid of it. As a metal is a beauty, a pleasure to work with, it can be polished and conducts very well. It's hard to count how many workers are handling aluminum each day. In fine particles, it can be even inhaled.
To propose something near a conclusion, for sure there's a limit where the effects of aluminum intake start to be worrying. With high levels, the aluminum poisoning has a well-known group of side-effects as muscle weakness, anemia, stunting, dementia, spinal deformities, osteoporosis and others. Fortunately, the organism by principle expels the aluminum. However not all because the organism has several places in which a form of storage could occur. So the word is newly precaution with this metal, avoiding it as much as possible in general.