Exposure to bisphenol A (BPA), a common ingredient in dental materials, increased the risk of sexual dysfunction in a study published in the Journal of Andrology (May 13, 2010).
Researchers from Kaiser Permanente and the Shanghai Institute of Planned Parenthood Research took urine samples from 427 male workers in regions of China with factories that use BPA in making epoxy resins. They then surveyed the men about their sex lives. They found a statistically significant correlation between urine BPA levels and sexual dysfunction in the factory workers, and a trend toward a correlation in men who lived near the factories but didn't work in them.
The more BPA found in the workers' urine, the more likely they were to suffer from decreased sexual desire (p < 0.001), difficulty having an erection (p < 0.001), weak ejaculation, and overall dissatisfaction with their sex life (p < 0.01).
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