The former cardiothoracic surgeon said the U.S. president also joked that Fanta Orange couldn’t be bad since it was “freshly squeezed.”

Trump believes diet soda ‘kills cancer cells,’ Dr. Oz says

The former cardiothoracic surgeon said the U.S. president also joked that Fanta Orange couldn't be bad since it was "freshly squeezed."

By Mekishana Pierre

Mekishana Pierre

Mekishana Pierre is a news writer at **. She has been working at EW since 2025. Her work has previously appeared on Entertainment Tonight and Popsugar.

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on April 15, 2026 11:24 a.m. ET

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Dr. Mehmet Oz; Donald Trump. Credit:

Andrew Harnik/Getty; Win McNamee/Getty

- Dr. Mehmet Oz said President Donald Trump justifies his love for diet soda by suggesting it's good enough to cure cancer.

- "Your dad argues that diet soda is good for him because it kills grass, so therefore, it must kill cancer cells inside the body," Oz told Donald Trump Jr.

- Oz added that Trump even joked once that Fanta Orange couldn't be bad for him because it's "fresh-squeezed."

Donald Trump has claimed many times over that he's in near-perfect health at his 80 years of age, and it turns out that he might be attributing that to the perceived powers of diet soda.

According to Dr. Mehmet Oz, the U.S. president justifies his habit of drinking diet soda by suggesting it's good enough to cure cancer. The former cardiothoracic surgeon shared the revelation during an interview with Donald Trump Jr. for his podcast, *Triggered with Don Jr.*, on Monday.

"Bobby [Robert F. Kennedy Jr.] and I usually go to the meetings together," Oz told Trump's eldest son. "Then comes the diet soda pops, which your dad argues that diet soda is good for him because it kills grass — if it's poured on grass — so therefore, it must kill cancer cells inside the body."

Donald Trump and his son, Donald Trump Jr., in 2021.

CHANDAN KHANNA/AFP via Getty

The head of the Centers for Medicare & Medicaid Services continued, "You know, we were on Air Force One the other day, and I walk in there because he wants to talk about something, and he's got an orange soft drink on his desk. He's got a Fanta on the desk."

"And I say, 'Are you kidding me?' So he starts to, like, sheepishly grin," Oz recalled. "He says, 'You know, this stuff's good for me, it kills cancer cells.'"

Oz added that Trump even joked once that Fanta Orange couldn't be bad for him because it's "fresh-squeezed." (Fanta Orange is made with orange juice from concentrate.)

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Trump Jr. chimed in to defend his father, suggesting that the former reality TV host might be onto something.

"Because I will say this: I know a lot of guys pushing 80 — not a lot have his level of energy, recall, stamina," he added — although he noted that it probably shouldn't be adopted as government policy.

Oz agreed, telling Trump Jr. that his father had a health record that looked "like he had dictated it," claiming the president's testosterone was "through the roof."

"My father eats like a blue-collar American. It's not a show, it's just what he does," Trump Jr. said. "He's got his two Big Macs and multiple fries, and he basically convinces Bobby [to hold it for the picture] ... he was just like a kid caught with his hand in the cookie jar."

Donald Trump departs the White House on Aug. 1, 2025.

Win McNamee/Getty

The pair's conversation came after Trump had McDonald's delivered to the Oval Office on Monday with DoorDash to promote his No Tax on Tips policy he says has meant big rebates for Americans who earn gratuities.

The Trump-backed tax and spend package approved last summer allows Americans to temporarily deduct some federal taxes from income earned on tips. It lets certain workers deduct up to $25,000, but it phases out for those with higher incomes.

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