Colostrum works in terms of food allergies because it repairs the intestinal lining of your gut, and it is very effective at that task too. Ofcourse, I'm suggesting that a leaky gut is the initial cause of food allergies due to undigested particles being allowed into the bloodstream thereby creating a response from your immune system, as the immune system thinks invaders are in your blood and produces anti-bodies to counteract this threat. Any time you eat the same food, and the same process occurs where the undigested particles get into your blood your immune system reacts and invariably you feel ill as a consequence.
Its all very simple, heal the gut, then no undigested particles get into your blood, then your immune system doesnt need to act because everything gets digested within your intestine, exactly where it is supposed to in the first place. This is where colostrum comes in to play as it is effective at repairing damaged intestinal tissue.
Lets say for example you cannot eat bread due to a gluten intolerance at this point in time, however you also have a leaky gut. If you heal the leaky gut, you will no longer have an intolerance to the gluten as the immune system doesnt need to attack what is not in the blood. If the gluten remains in the intestine, it will eventually be digested naturally and correctly.
Just incase you only read this far in the thread, I must also point out that gluten intolerance that is caused by the genetic disorder celiac disease wont be cured by repairing the intestinal wall as Carthage rightly points out in his next post. If you have temporary gluten intolerence due to leaky gut syndrome this will be cured when you heal your intestinal wall, and by healing the wall you can determine whether or not you are celiac in the specific case of gluten intolerence. Either way by repairing the intestinal wall you are given a clear view of what you have to do to feel good again.