1975 Head & Shoulders advert.
Procter & Gamble researchers first decided on making a new anti-dandruff shampoo in 1950. Nearly a decade of research went into making a new formula, which introduced the product pyrithione zinc into a shampoo.
Head & Shoulders was first introduced to the U.S. market in November 1961, as a blue-green shampoo formula.
The brand’s “Extra Strength” product had a cameo role in the 2001 film Evolution, where its startling copper orange colour was shown.
An endorser of Head and Shoulders Shampoo is NFL Superstar Troy Polamalu, who plays for the Pittsburgh Steelers.
Info gleaned from Wikipedia