Aluminum is one of the most abundant metals on earth (1).
In its natural state, it is bound to other elements like phosphate and sulfate in soil, rocks and clay.
However, it’s also found in small amounts in the air, water and in your food.
In fact, it’s naturally occurring in most foods, including fruits, vegetables, meats, fish, grains and dairy products (2).
Some foods, such as tea leaves, mushrooms, spinach and radishes, are also more likely to absorb and accumulate aluminum than other foods (2).
Additionally, some of the aluminum you eat comes from processed food additives, such as preservatives, coloring agents, anti-caking agents and thickeners.
Note that commercially produced foods containing food additives may contain more aluminum than home-cooked foods (3, 4).
The actual amount of aluminum present in the food you eat depends largely on the following factors:
Aluminum is also ingested through medications that have a high aluminum content, like antacids.
Regardless, the aluminum content of food and medication isn’t considered to be a problem, as only a tiny amount of the aluminum you ingest is actually absorbed.
The rest is passed in your feces. Furthermore, in healthy people, absorbed aluminum is later excreted in your urine (5, 6).
Generally, the small amount of aluminum you ingest daily is considered safe (2, 7, 8).
Summary:Aluminum is ingested through food, water and medication. However, most of the aluminum you ingest is passed in feces and urine and is not considered harmful.
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