GL-70 was an additive in Gleem toothpaste

Gleem toothpaste

Gleem is a brand of toothpaste made by the Procter & Gamble company. Advertisements in the 1950s stated that it has GL-70, a supposed odor- and bacteria-fighting compound. Gleem...

 in the 1950s, and was advertised as its unique decay and mouth-odor fighting ingredient. Whether or not GL-70 was a genuine ingredient is unknown.

Interestingly, a reference to GL-70 is made by the character of Grandpa in the rare color pilot for The Munsters

The Munsters

The Munsters is a 1960s American family television sitcom depicting the home life of a family of monsters. It starred Fred Gwynne as Herman Munster and Yvonne De Carlo as his wife, Lily Munster. The series was a satire of both traditional monster movies and popular family entertainment of the era,...

television program, as he adds it to a love potion he's concocting.

A tube of Gleem from the 50's notes that GL-70 is a "Trademark for the active ingredient, a blend of anionic sulfonates."