Levels of cancer-causing dioxins and dioxin-like PCBs (polychlorinated biphenyl) in food have fallen by around 50% over three years, according to a study published by the Food Standards Agency. The 2001 UK Total Diet Study of dioxins and dioxin-like PCBs in food, which analysed samples from each food group and from 24 different UK locations, showed that the total amount of dioxins in the diet has fallen by around 50% for all age groups since the last survey in 1997. Exposure to dioxins in food has fallen by around 85% over the last 20 years and continues to fall steadily.