Continued drops in IQ, stunted growth, and hearing loss. May contribute to ADHD and learning disabilities. Blood levels of about 200 are associated with an eight-point drop in IQ.

• 世界?生????值100作??童健康是否受到?注的分界?。然而，最近的研究表明，??值超?50?，智商可能??始?微降。世界?生??最近修正其指?方?，反映了新研究的成果。