Original Diet-Magic! This is the prototype for all Diet Ads. A massive interstate ad campaign that was honed in fatter counties across the U.S.A. and brought to New York City's subway system in 1997, maybe even earlier. The catchy trademarks "lose 30 lbs in 30 days" "DIET MAGIC!" and "100% Natural 100% Guaranteed" have become touchstones for diet ads everywhere. Click on Related Adverts for a slew of similar ads in red and yellow.