Tonight, a spicy, crunchy snack with such a following among america's kids and some schools are considering banning them. They're called flamein' hot cheetos and movement to turn them into lunchroom... See More
Tonight, a spicy, crunchy snack with such a following among america's kids and some schools are considering banning them. They're called flamein' hot cheetos and movement to turn them into lunchroom contraband is part of a growing concern over how much salt kids are eating and the serious health problems that could result. Abc's linsey davis brings us inside this controversy. Reporter: In the battle over high-calorie, high-salt snacks and school kids, the latest target -- flamein' hot cheetos, spicy orange curls so popular people even have facebook fan pages for them. And there is also this video with more than 3 million hits on youtube. But now, their extreme popularity has the bite-size crunchy snacks under assault. Officials in school districts from california to illinois are trying to get them banned. If children want to bring in snacks that are high in fat, high in calories that's their choice, they can do that but we won't provide those kind of foods. The cheeto epidemic is major. Reporter: A teacher featured on a video talking about how problematic they are. Flaming hot cheetos probably the biggest problem we have. Reporter: Another teacher in new mexico st. Implord parents not to let their kids bring them to school. I don't have her bringing a family size bag, I know she'll eat them all railroad they it contains 26 grams of fat and contains a quarter of the sodium you're supposed to eat in the entire day. And it's sodium, also known as salt, that has nutritionists increasingly worried. If I were to say is there a lot of sodium in the food that you eat would you have any idea what I'm talking about? Yes. Yes. A lot of my food has soy sauce. Reporter: Most adults have 2300 milligrams in day about a teaspoon but researchers found adults and children are consuming on average an alarming 3400 milligrams of sodium a day, about a third more than they should. And salt is found in a lot of places much less obvious than a bag of chips. Bread, salad dressing, most of the items in the frozen foods aisle, even ice cream. It's in the like kids are picking up salt shakers, this is in their lunch meat, for example. And in a lot of food you doeblt think is salty or tastes salty, either. Reporter: One of the most popular bag lunches for kissed. When ask you parents what do they pack a lot of will say, good old turkey sandwich. Reporter: It packs a punch of more than 1,000 milligraps of sodium just in one sandwich. We'll trade that for an english muffin, that will cut the sodium significantly from the white bread. We'll swap out the deli meat for a chicken breakfast that's been grilled or baked. Reporter: Registered die television cynthia sass suggestion parents ajucht the children's diet now. Too much sodium can lead to high blood pressure and type ii diabetes. Mustard saves sodium. Reporter: A lot. The turkey sandwich has 65% more than this chicken sandwich but will the kids eat it? Does this look better than the school cafeteria food? We put a panel kifds at this ymca in new york city to a taste test. On the red plate higher salt turkey sandwich, on the blue plate, lower salt chicken sandwich. This is good. A lot better than the peanut butter honey. Reporter: You like that? It's good. Reporter:10-year-old theodore wasn't fooled for a minute. I think that would have more salt on the white bread because mayo has more salt than other condiments. Reporter: But this was all about taste and if they would actually eat the low salt option. What do you think? You seem to be enjoying both. I think both of them are great but the blue, itas this really good, zesty taste with the mustard and the chicken. It's amazing. I love it. Reporter: Everyone who liked red better raise your hand. Three. Blue? Okay. Three -- you like blue better. It's a tie. With the group split over which lunch they liked better we moved on to some of their favery snacks like cheetos. Frito-lay who makes and bags them with cartoons on front tells abc news they're committed to responsible and ethical marketing practices not to market to kids 12 and under. We swap the original flavor cheetos. 250 milligraps per serving. With these lightly salted potato chips. Oh, 85. Big difference. About a third. We're talk same aisle of the supermarket, same category of food. Not talking about going from the chip aisle to produce aisle. And we change this. 240 milligraps of sodium versus 35 milligrams of seed yum. Reporter: A few more snacks. On the red plate, lightly salted chips and koch lat kisses. Blue plate, the higher sodium snacks, cos and cookies. Less saltier than usual. Reporter: The kids weren't tricked. Detecting our lightly salted chips right away. You might feel like it doesn't have salt. Reporter: And some assume something sweet wouldn't also be salty. I don't think kisses have salt in there at all. I don't think -- I think just sugar and chocolatey flavor. Reporter: In the end when it came to the sandwich or snack sometimes they actually preferred the reduced salt option. I love chocolate. I love everything here. So, I'm in love with it. Reporter: For "nightline" I'm linsey davis in new york.
This transcript has been automatically generated and may not be 100% accurate.