it involves medical clearances from specialists including gastroenterologists, psychologists, nutritionists. but some doctors are skeptical arguing kids may not understand the lifestyle changes that come with the surgery. if you re telling a kid you re going to need a lifetime of medical care and close follow-up, they may not be prepared for that. reporter: dr. evan used to perform weight loss surgery on teens. i ve seen a lot of people with bad results, including people who were fairly young when they got these operations. post-surgery, what are some of the side effects that kids could potentially see? the biggest one is the micronutrient deficiencies, the body s going to be absorbing a whole lot less in terms of caloric intake. reporter: ivan follows strict dietary restrictions and has made major adjustments to almost every aspect of his life. i could have easily served myself a full plate. now i m serving myself own a salad plate. i m feeling really good.
salad plate. reporter: he says it s all worth it. i m looking to lose another 50 pounds. reporter: all while gaining a new lease on life. kathy park, nbc news dallas. when we come back, there s good news tonight about a fourth of july celebration unlike any other across the country. if youou ve had sesensitivit, those zizingers can n really cae some o of that jololting pai. ththere is onene great sololun out there e with sensosodyne. it c creates a protectitive barrierer, and nonow they getet to feel l , oh, this i is a producuct thatat actually y works.