L.D. 50 (album)

L.D. 50 is the debut studio album by American heavy metal band Mudvayne. Released on August 22, 2000, it is the band's first release on Epic Records, following the independently-released extended play Kill, I Oughtta. The album was co-produced by Garth Richardson and Mudvayne, and executive produced by Steve Richards and Slipknot member Shawn "Clown" Crahan.

The band's elaborate visual appearance resulted in increased recognition of the band, and L.D. 50 peaked at No. 85 on the Billboard 200. While initially receiving mixed reviews from critics on release, the album would gain praise over time for its technical and heavy style of music.

In 2018, readers of Revolver voted it as the fourth-greatest nu metal album of all time. In 2021, the staff of Revolver included the album in their list of the "20 Essential Nu-Metal Albums". In 2022, Eli Enis of Revolver included the song "Internal Primates Forever" in his list of the "10 Heaviest Nu-Metal Songs of All Time".