On January 22, 2021, a divided Ninth Circuit panel ruled that a nutritional guide could constitute commercial speech subject to the Lanham Act.

The Lanham Act is best known for being the primary federal trademark statute in the United States. In addition to the trademark provisions, Section 43(a) of the Lanham Act creates a cause of action for false advertising and prohibits any person from misrepresenting his or another person’s goods or services in “commercial advertising or promotion.”

In this case, defendant NutriSearch Corporation published a guidebook that compared ...