If I had a superpower...now this is kind of silly...but I have been thinking that wouldn't it be great to have a super power where you could taste allergens in your kids food? So you could taste their meal at a restaurant and say "Send it back it has been cross contaminated with cheese!" or you test the Moon Pies with the new "may contain" labels and say "Yep, I detect peanut residue." You'd be free to eat out, try new things and keep your food allergic children safe at the same time.
Yep, if I had a superpower it would be allergen detection.