The effects of L-carnitine on sperm parameters in smoker and non-smoker patients with idiopathic sperm abnormalities.

Purpose: To determine the effects of L: -carnitine on sperm parameters in patients with idiopathic sperm abnormalities.

Methods: In an academic reproductive care center, 170 patients including 48 smokers and 122 non-smokers participated in a before-after study. Men were given 1 g of L: -carnitine orally 3 x daily for 3 months.