Rach's Hearty Chicken Soup Features A Good-For-You Grain + Self-Tanning Secrets for Summer! - S13.E148

At home teeth whitening that actually works? Our viewers are trying out products with big claims in today's "Human Lab" show. Gretta Monahan is breaking down self-tanners to help you get a summer tan while avoiding UV rays. Two of our favorite foodies, YouTuber Daym Drops and 12-year-old food critic Luca are trying out a meal you have to see to believe, while Rach is making a healthy and hearty chicken soup.