Dr. Susan Sharma: This is insider medicine in 60, From Colorado - Popcorn can cause choking but can it cause breathing problems? A man who ate 2 daily bags of popcorn per day- and often inhaled the aroma because he loved it has been diagnosed with bronchiolitis obliterans- a rare lung condition. The condition has also been called ""popcorn lung"" and has been seen in workers exposed to diacetyl- an ingredient used to make the popcorn buttery. The levels of diacetyl measured from his house were similar to those seen in popcorn factories. From Texas - Activity of a gene may determine if you are fat or slim. The high activity of the gene Adipose, or Adp, was seen in slim organisms whether they were worms or mice; and low activity in those who were obese. Expect development of drugs targeting this gene. From Columbus - While college athletes may be considered to be the epitome of health, they may be prone to reactive airways. A study of over 100 college athletes shows that nearly 40% had excercise-induced airway narrowing, despite the fact that nearly 90% had no known history of asthma. The condition is also commonly seen in Olympic athletes. And finally from Oklahoma - Add pets to the long list of those affected by smoking. New research shows a higher risk of cancers in cats of smokers. In particular, the risk of mouth cancer is high- which may be related to grooming habits of cats. Carcinogens from second hand smoke get on carpets and are transferred to the hair of cats - which are then licked. For Insidermedicine in 60, I'm Dr. Susan Sharma.