If you have food intolerances, it can be a real battle to lose weight as I have found out. Food intolerances mean that your body treats certain foods or food additives as if they are the enemy and reacts with symptoms such as nausea, bloating, intestinal problems, congestion, skin rashes, and others. Obviously, if your system is always messed up because of these offending foods it's hard to lose weight. The trick is to find out what foods are causing the problem. The best way to do that is to keep a food diary, writing down everything you eat and any symptoms that develop. Once you identify the problem foods and eliminate them, you have a fighting chance of losing weight.