Peanut allergies are typically considered a problem for children, but new research shows that many adults are now developing the potentially life-threatening allergy; Nancy Chen reports for CBS2.; "This was actually really suprising for us, that adults are developing more food allergies." Study author Dr. Ruchi Gupta says it could have to do with microorganisms that make up the microbiome of the gut, as well as infections that alter the immune system, and hormonal changes.