A Mars a day helps you work, rest and play.

This line is an advertising slogan associated with the Mars chocolate bar, coined in the United Kingdom as part of mid-to-late 20th-century mass-market confectionery marketing. It deliberately echoes the well-known health maxim “An apple a day keeps the doctor away,” recasting a candy bar as a source of everyday energy and well-being. The phrasing “work, rest and play” aligns with postwar consumer culture and the rise of catchy, rhythmic taglines designed for radio and television commercials. Because such slogans are typically produced by advertising agencies rather than a single identifiable writer, it is often cataloged as “Anonymous.”

The slogan uses playful parody to borrow the authority of a proverb and transfer it to a commercial product. By promising help with “work, rest and play,” it frames the candy bar as universally useful—fuel for productivity, comfort, and leisure—compressing an entire day’s needs into a single purchase. The line’s persuasive force comes from its cadence and triadic structure, which makes it easy to remember and repeat. Read critically, it exemplifies how advertising appropriates the language of health and routine to normalize consumption, presenting indulgence as a practical, even wholesome, daily habit.