The Food Standards Agency (FSA) today published results of a survey of dioxin and dioxin-like PCBs in 33 samples of branded fish oil supplements bought from UK retailers. Most of the levels found were low, although two batches of cod liver oil contained higher levels, which if the oils were consumed at the recommended dosage, would result in a daily intake of more than twice the recommended TDI (tolerable daily intake) set by the independent Committee on Toxicity.