Marketing
Early commercials stated that Zest is not a soap because it does not leave the sticky film that soap does. A 1970-era commercial illustrated this concept with an apparent demonstration in which two photographs of a person were each dipped in one of two bowls, one labeled "soap" and the other "Zest." The photograph of the "soap" bowl had a scummy coating, whereas the one that came out of the "Zest" bowl had no such coating.
The brand experienced an upswing in sales in the 1980s and early 1990s, with the advertising slogan "You're not fully clean unless you're Zestfully clean!" coined by the BBDO sloganeer James Jordan. One commercial showed a teenage girl who used ordinary soap scratching her back against the metal pole of a school bus stop sign at her bus stop because her soap left a sticky film that she couldn't see but could certainly feel. While she is still scratching her back, the bus shows up. Yet another commercial featured NFL fullback Craig "Ironhead" Heyward promoting the Zest bodywash product: a liquid in a plastic bottle. Television commercials would incorporate the slogan as part of the jingle and end with someone displaying a towel with the "Zestfully clean" slogan on the back; these towels have often been given away in company promotions.
In 2007, in a seeming about-face of their 'no soap film' policy, Procter & Gamble discontinued the old product and relaunched Zest with a size reduced by 11% (from 4.5 to 4.0 ounces), a new bar shape, and a new, more intense fragrance. The product line was extended with the introduction of Zest body wash. A recent perusal of their support site yielded the following claim: "Zest Linen Fresh, Tropical Fresh, and Tangerine Mango Twist are no longer made with synthetic ingredients. They're 100% soap and have a new 'surf' shape."
At one time, the range of products marketed as Zest comprised Aqua Pure, Energy Fresh, Linen Fresh, Ultimate Clean (said to offer antibacterial action), Spring Burst, Tropical Fresh, and Whitewater Fresh; along with three liquid body washes, Spring Splash, Morning Garden, and Ocean Energy.
The Zest site now features several variants: Aqua-Pure, Aloe Splash, Ocean Energy (featuring Energizing Effects), Mint Explosion (featuring Stimulating Effects), Tangerine Mango Twist (featuring Stimulating Effects), and Whitewater Fresh (which was initially discontinued in 2006 but was brought back in 2012). Each variant was advertised as available as a bar and a bottled liquid labeled as "Bodywash".