Oprah Winfrey is seen on stage during her 'An Evening With Oprah' tour at Allphones Arena on December 12, 2015 in Sydney, Australia.
Don Arnold—WireImage
February 26, 2016 10:38 AM EST

Weight Watchers sales declined rapidly in the last quarter, despite media celebrity Oprah Winfrey’s investment and advertising campaign.

Weight Watchers reported a 21% drop in quarterly revenue down to $259.2 million, and active subscriber membership dipped 4.8% during the fourth quarter ending Jan. 2, Reuters reports.

Winfrey joined the weight-loss company in October 2015 after it had experienced a nearly three-year decline in sales. She made a $43.2 million investment for a 10% stake and was added to the company’s board; its stock more than doubled on the day her involvement was announced.

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Write to Tessa Berenson at tessa.berenson@time.com.

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