Farmed and wild salmon Often recommended as one of the best animal sources of omega-3s, farmed salmon should not be consumed regularly - it contains non-negligible amounts of contaminants. Residues left by disinfectants and antibiotics used in fish farms may also have an effect on the health of consumers or interfere with some medical treatments. http://slowfood.com/slowfish/pagine/esp/pagina.lasso?-id_pg=88