Yes — Kathy Hilton really did try a “Jell-O diet.” But no, it was never a real celebrity-approved weight-loss method. Hilton has publicly admitted she was fooled by AI-generated deepfake videos that falsely showed Oprah Winfrey, Michelle Obama, Kelly Clarkson, and Dr. Oz promoting a diet built around Jell-O, vinegar, and baking soda. None of those celebrities have ever endorsed this diet, and Hilton says following it left her bloated and unwell before she realized it was a scam.
- Kathy Hilton revealed the story herself during the Season 15 reunion of The Real Housewives of Beverly Hills, hosted by Andy Cohen.
- She described a “Jell-O diet” she believed involved vinegar and baking soda, and thought it was backed by Oprah Winfrey, Michelle Obama, Kelly Clarkson, and Dr. Oz.
- She initially lost two pounds, which convinced her the diet was working.
- She then became severely bloated and said it “messed up my whole entire system.”
- She later discovered the celebrity endorsements were fake, generated using AI to impersonate real public figures.
- Oprah Winfrey’s team has directly denied any involvement, telling media outlets that anything not posted on her official Instagram account is not something she’s part of.
- Fact-checking outlet Snopes investigated the viral “Jell-O diet” claims and found no evidence linking any of the named celebrities to it.
- This scam fits a growing pattern of AI deepfake ads used to sell weight-loss products, which has also targeted Oprah with fake weight-loss gummies and a “pink salt trick,” and used TODAY’s Al Roker to push a fake hypertension product.
How the Story Came Out
During part two of the RHOBH Season 15 reunion, Kathy Hilton told her castmates — including Kyle Richards, Dorit Kemsley, Erika Jayne, Sutton Stracke, and Bozoma Saint John — that she’d gotten caught up in a diet trend she’d seen online.
“I went on the Jell-O diet,” Hilton said. “There’s a new Jell-O diet that Oprah Winfrey, Michelle Obama, Kelly Clarkson [did] — with vinegar and baking soda.”
At first, the results seemed to confirm it was legitimate. Hilton said she dropped two pounds early on. But things went downhill quickly. “I was so bloated I could not fit into anything,” she said. “It has messed up my whole entire system.”
It was only afterward that she pieced together what had actually happened. “They lied to me. It was all IA — AI,” Hilton said, correcting herself mid-sentence. When Andy Cohen asked whether the “Oprah” she’d seen was an AI-generated version, Hilton confirmed it — and added that a fake version of Dr. Oz was used to promote it too.
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What Was Actually Going On: An AI Deepfake Scam
The “Jell-O diet” Hilton fell for wasn’t a real wellness trend — it was an AI-generated marketing scheme. Scammers used deepfake technology to create fake video and audio of well-known celebrities appearing to endorse the diet, then spread the ads across social media to drive sales of related products.
Oprah Winfrey’s team addressed the situation directly, stating that unless something is posted on her verified personal Instagram account, it isn’t something she is actually involved in, and warning consumers to be cautious before handing over personal information or money to anything claiming her endorsement. A representative for Dr. Oz did not respond to media requests for comment.
Fact-checking site Snopes separately investigated the viral claims and reported finding no evidence that any of the celebrities named — including Oprah and Dr. Oz — had any real connection to the Jell-O diet.
Part of a Bigger Pattern
Hilton’s experience isn’t an isolated incident. AI-generated celebrity endorsements have become a recurring tool for diet and wellness scams:
- Oprah’s likeness has previously been used without permission to promote weight-loss gummies and a viral “pink salt trick” drink, the latter of which drew more than 170 complaints to the Better Business Bureau from people who said her image convinced them to buy it.
- TODAY weather anchor Al Roker’s face was used in 2025 to sell a hypertension product he never endorsed and has no connection to.
- A woman previously told TODAY she lost hundreds of dollars after being deceived by a deepfake video of her own surgeon promoting a health product.
Experts recommend watching for mismatched lip movement or audio in video ads, searching for independent reviews of a product before buying, and treating any “miracle” weight-loss claim with skepticism — especially when it’s paired with a celebrity endorsement that only appears in an ad, not on that celebrity’s own verified account.
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The Verdict
True, with an important correction. Kathy Hilton did try a “Jell-O diet” and did experience real side effects, including bloating, after following it. That part of her story checks out and she’s stated it publicly herself.
False: the diet itself, and any claim that Oprah Winfrey, Michelle Obama, Kelly Clarkson, or Dr. Oz endorsed it. Those endorsements were fabricated using AI deepfakes as part of a marketing scam, and every named celebrity’s team that has commented has denied involvement. There is no credible evidence that a Jell-O, vinegar, and baking soda regimen is a legitimate or medically recommended weight-loss method — it has no basis in established nutrition science.
Frequently Asked Questions
Did Kathy Hilton actually go on the Jell-O diet?
Yes. She said so herself during the RHOBH Season 15 reunion, describing how she followed it after seeing what she believed were celebrity endorsements online.
Did Oprah Winfrey really promote the Jell-O diet?
No. Oprah’s team has explicitly denied any involvement and said that any content not posted on her own verified Instagram account should not be trusted as coming from her.
What happened to Kathy Hilton after trying the diet?
She said she initially lost two pounds, but then became extremely bloated and felt it disrupted her overall system before she found out the endorsements behind it were fake.
Is the Jell-O diet an AI scam?
Yes. The version of the diet Hilton encountered was promoted using AI-generated deepfake videos of celebrities who never actually endorsed it, designed to convince people to buy related products.
Did Dr. Oz endorse the Jell-O diet?
No. Hilton said a fake AI version of Dr. Oz appeared in the promotional content. A representative for Dr. Oz did not respond to requests for comment, and there’s no verified endorsement from him.
How can I tell if a celebrity diet endorsement is fake?
Check whether the endorsement appears on the celebrity’s own verified social media account. Be wary of video ads with mismatched audio or lip movement, search for independent reviews before purchasing, and treat “miracle” or fast-result weight-loss claims as red flags, particularly when they’re tied to a product for sale.
