Scientists have finally figured out why it is that fatty food is bad for you, and why people who have a poor diet get ill more often. Fatty food affects the immune system, and prevents it from functioning properly, a new study has discovered. It also seems to be put it on a constant high alert, which causes inflammation that makes the person obese. Louise Strandberg from the Sahlgrenska Academy at the University of Gothenburg explains: “Obesity is usually associated with inflammation that does not result from an infection, which simply means that the immune defences are activated unnecessarily.”
She fed laboratory mice a diet that was primarily lard, and discovered that their immune systems were less active, and the white blood cells were less able to deal with bacteria in the blood.
(Source: http://www.sahlgrenska.gu.se/english/news_and_events/news/News_Detail//Fatty_food_can_weaken_the_immune_system.cid906630)