The Subway iet involves replacing two meals each day with subs from the Subway restaurant chain. It gained publicity during the 1990s as part of an advertising campaign by the chain. Dieters can choose from the "Eight Under Six" section, which contains subs with 6 grams of fat or less. Jared Fogle is credited with starting the diet when he successfully lost a lot of weight by eating the subs daily. He became famous because of his story and now works to help others lose weight following the same diet plan.