The diet pills touted in a social media post with "every judge on Shark Tank backed this product" were never endorsed by a single judge, nor were the pills ever presented on the TV show. Such fake promotions are part of what's called a "subscription scam."
Many of the Shark Tank "sharks" have spoken out about these scams, which use their names and photos.
On November 13, 2019, ABC posted a notice headlined "PSA: Beware of the Shark Tank Scams."
One of the "Shark Tank" judges, Lori Greiner, has a page on her website about such scams.
AARP issued a warning. "Beware Keto Diet Pill Scams," which tells the stories of two people taken in by false advertising. They thought they were going to spend about $20 but wound up with charges to their credit cards over for over $200.