How deep does your love of carbs really go? Multivitamin company Feel is looking for volunteers to eat only “beige” foods—things like white bread, pasta, chicken, eggs, and rice—while taking one multivitamin each day. They’ll have their nutrient levels tested before and after the experiment, and for their trouble they’ll earn about $2,200. Participants will be monitored by a qualified nutritionist and doctor. Feel stresses that they do not encourage replacing a healthy diet with vitamins, but that they aim to deliver more of what the body needs each day.