Erin Andrews is trying to sell me probiotics.1 She is walking through a bustling gym wearing a sharp blazer and a fresh blow out. Male patrons gawk. She bubbles that the euphoric powers of probiotics can improve digestion and immunity. She takes probiotics, and she has grown tall, healthy, and has a sweet gig interviewing football players. And now every gym member is clamoring to get a slice of that probiotic pie.