he may become a believer after meeting johnny gossett. he is a normal teenager. he is a good student and studies hard and a pretty talented pianist. today at lunch he has eaten something in the past that would be off-limits. a recess peanut butter cup. johnny is one of the millions of kids who has a food allergy and he is allergic to peanuts. one of the most difficult to avoid foods on the planet. do you remember a time when you did not worry about peanuts? >> no. the first reaction was when he was 8 months old. >> it was a bite of a simple peanut butter and jelly sandwich. he was covered from head to toe with hives. >> it became a bigger part of our lives. >> johnny has been taking part in a study for the past several years. a life changing truman tried to cure him of his allergy. trying to cure him. the idea, introducing peanuts smalslowly to desensitize him. >> he reacted to 1 milligram. 300 milligrams in 18 months. one 300th of a peanut. gretzky has taken a daily maintenance dose of peanut protein. >> the goal that is to gradually teach his body to learn to t