Though it is not as frequently discussed, liver damage is a significant risk associated with consuming fast food. Junk food is often filled with trans-fat, an artificial fat that is used as a stabilizer so premade foods can sit for long periods of time before they are consumed. As your body works to remove this fat from your system it can build up in the liver and cause damage. This is very similar to the damage which is caused by regularly consuming alcohol. If this is not kept in check it can lead to liver failure.