What health effects are associated with PCBs?

• A. Increased skin flexibility
• B. Improved immune function
• C. Cancer, immune and reproductive damage
• D. Enhanced memory

Answer: (C)

PCBs are persistent environmental pollutants that accumulate in fatty tissues and remain in the body for a long time. Because of this, exposure over time can lead to a range of serious health effects. The strongest, most comprehensive health impact associated with PCB exposure includes cancer risk, immune system damage, and reproductive harm.

Cancer risk arises from the way some PCBs interact with cellular pathways, including those shared with dioxins, which can promote tumor development in animals and is supported by some human data. Immune effects are seen as changes in immune cell function and reduced responses to vaccines, meaning a person exposed to PCBs can have a weakened ability to fight infections. Reproductive harm includes disruptions to hormone balance and fertility, as well as developmental effects in offspring, reflecting the broad impact PCBs can have on reproductive and developmental processes.

The other options suggest benefits that do not align with the toxic nature of PCBs. PCBs do not increase skin flexibility, enhance immune function, or improve memory; the health effects of PCB exposure are better described by harm to cancer risk, immune function, and reproductive health.