Dietitian Josie Porter takes three evidence-backed supplements. Kimberly Espinel Supplements are more popular than ever, but they're unregulated in the US. There is a time and place for supplements, but often a food-first approach is better. The dietitian Josie Porter takes three evidence-backed supplements. As a registered dietitian who worked in clinical settings for a decade, Josie Porter has seen supplements go from a treatment for deficiencies to a wellness product taken in the pursuit of