Today, our body is exposed to more toxins than ever before, whether it's the air we breath, the products we use, or even medicine we take. One potentially dangerous toxin is aluminum. Something that people who deny aluminum's toxicity issues mention is that aluminum is prominent throughout the earth's crust. Which is true. However, what they fail to mention is that aluminum wasn't widely bioavailable to humans until the latter part of the 19th century when it began to be mined for creating metals and medicines. We all have some aluminum in our body, but the tissues that are most susceptible to toxicity are the ones with low cell turnover, such as bone matter, heart tissue, and brain tissue. Aluminum injected bypasses the liver and kidneys and tends to remain in slow cellular replacing tissues.