Decreased sperm counts in Swedish users of oral tobacco.

Background: Smoke-free tobacco via moist oral snuff (snus) is used daily in more than 20% of Swedish men. Negative effects of cigarette smoking on sperm parameters are well documented, unlike for snuff, despite relevance also for other smoke-free nicotine products.

Objectives: We wanted to investigate whether reproductive parameters differed between users and non-users of snuff, and whether the amount of snuff and nicotine exposure mattered.