Celiac Disease is an auto-immune disorder that affects about 3 million Americans, including high-profile people like Jennifer Esposito. Jennifer opens up about her struggles with the disease and why she's feeling great today. Watch more clips: http://ktie.tv/1kdogIQ Follow Katie on Facebook: https://www.facebook.com/KatieCouric Follow Katie on Twitter: https://twitter.com/katiecouric Subscribe to Katie's channel: http://ktie.tv/1eUPgMf