Can aluminum be used in medicine?

Yes, aluminum is used in medicine, though not directly ingested or injected. It is utilized in the form of aluminum salts in vaccines as an adjuvant to enhance the body's immune response. Aluminum is also used in medical equipment, such as in the manufacturing of certain types of surgical tools and implants due to its lightweight and corrosion-resistant properties. However, its use is carefully regulated due to concerns about biocompatibility and potential toxicity.