Straight from the Lab, released in 2003 in the United States, is a seven-track bootleg mixtape of previously unreleased songs by Eminem.
"Can-I-Bitch" samples Slick Rick's song "Children's Story" in the first verse. It is also a word play on the title of Canibus's first album, entitled Can-I-Bus being a diss track to Canibus and is an answer song to the Pet Shop Boys' 2002 song "The Night I Fell in Love".
The diss track "Bully" is aimed at rappers Benzino, Irv Gotti and Ja Rule.
Another diss track titled "Hailie's Revenge" (sometimes referred as "Do Rae Me"), which features background vocals from Eminem's daughter Hailie Jade, is a response to Ja Rule's song "Loose Change", in which Ja Rule has insulted Eminem's family, including Hailie.
"We Are Americans" (later retitled "We as Americans") and "Love You More" are included in a bonus disc on Eminem's fifth studio album Encore.
"Come on In" (later retitled "6 in the Morning") was used on D12's second studio album, D12 World.