Depleted uranium is a byproduct of the production of enriched uranium for use in nuclear reactors or nuclear weapons.
It is uranium that has been depleted in its fissile isotope content, making it less reactive. It is used in military applications and as shielding material due to its high density.
However, depleted uranium also raises concerns due to its potential toxic and environmental effects. Research has been conducted on its health effects, and regulations have been established for its proper handling and disposal.