Has Oprah Winfrey endorsed or invested in the company behind Diet Drop?

1. Oprah’s known, documented diet-company ties: WeightWatchers

Oprah’s major, well-documented commercial relationship in the diet sector was with WeightWatchers: she publicly supported the brand, acquired roughly a 10% stake, served as a board member and spokesperson, and later stepped down and gave away shares — coverage of that history appears in People (summarizing the 10% stake, board membership and later divestment) and CNN Business (noting her exit and role in elevating weight-health conversation) ^{[1] [2]}.

2. No evidence in these sources that Oprah invested in “Diet Drop”

None of the supplied articles mention a company named Diet Drop or state that Oprah invested in or endorsed a business by that name; available sources do not mention Oprah and Diet Drop together, so a direct endorsement or investment claim about Diet Drop is not supported by the current reporting (not found in current reporting).

3. Fraudulent and AI-based fake endorsements are actively circulating

Consumer-protection reporting highlights a wave of scams using fake Oprah endorsements—sometimes AI-generated—to market weight-loss supplements; WRAL’s consumer piece explicitly states, “Oprah does not endorse any weight-loss supplement,” and local investigators reported a Utah woman who paid over $400 after believing an Oprah endorsement that turned out to be fake ^{[3] [4]}. These items show a pattern: scammers attach celebrity likenesses to supplements to sell products, often without any real celebrity relationship ^{[3] [4]}.

4. Context on Oprah’s recent weight-health disclosures that drive interest

Oprah has publicly discussed her own weight-loss journey and medical approaches, including using GLP‑1 medication and lifestyle changes, which has kept her name tied to diet and weight-loss coverage and fuelled public interest in products claiming her support ^{[1] [5]}. That visibility makes her an attractive figure for fraudsters and marketers seeking credibility by association ^{[3] [4]}.

5. Financial and reputational fallout for some diet brands tied to Oprah historically

Coverage documents financial swings related to Oprah’s past involvement with WeightWatchers — for example, reporting on large paper losses and stock volatility tied to the company after her investment, and mentions that she left the board as the business struggled ^{[6] [7]}. This underscores that when Oprah has formally backed a company it attracted substantial market attention — but also that such ties can be messy and are well-documented when they exist ^{[6] [7]}.

6. How to evaluate claims that “Oprah endorses/invested in X”

Given prolific fake-endorsement scams, a responsible approach is to seek primary confirmation: corporate filings (SEC), press releases from Oprah Winfrey’s representatives, or credible outlets reporting a confirmed business relationship. The supplied sources show confirmed ties when they exist (WeightWatchers), and they also show false or AI-manufactured endorsements being used to sell unrelated supplements — apply that dual standard to any “Oprah endorsed Diet Drop” claim ^{[1] [3] [4]}.

7. Bottom line and recommended next steps for readers

Based on the materials provided, Oprah has a documented investment and governance history with WeightWatchers, but there is no evidence here linking her to a company called Diet Drop; beware claims relying on viral videos or social posts, since reporting shows fake or AI-generated Oprah endorsements are already in circulation ^{[1] [3] [4]}. If you’ve seen a product claiming Oprah’s backing, check for corroboration via major news outlets or corporate disclosures before believing or purchasing; where those aren’t found, treat the endorsement as unverified ^{[3] [4]}.