What Strange Blue Liquid Did RFK Jr. Add to His Drink Mid-Flight?

Robert F. Kennedy Jr. is going viral on social media after he was caught on camera adding a mysterious blue liquid to his in-flight beverage, and internet sleuths believe they know what it is.

The leading theory among X users is that the prospective health secretary was dosing his drink with methylene blue.

Officially, the compound is injected as a treatment for the blood disorder methemoglobinemia, in which blood loses its ability to carry oxygen throughout the body. It is also used to dye textiles.

However, it has also gained a cult following as a potential health silver bullet that supporters claim can add years to one’s life.

“Looks like RFK Jr. is in on one of the best-kept secrets in biohacking—Methylene Blue," wrote Gary Brecka, a wellness influencer and self-described “biohacker.”

Countless other users were in agreement about the mystery substance’s identity.

Kennedy, however, did not immediately respond to the Daily Beast’s request for comment on the blue liquid.

In his post, Breck lauded methylene blue’s potential benefits, which he suggested include better “mitochondrial function,” improved focus and memory, and an antioxidant effect.

The compound counts at least one other high-profile figure among its supporters.

Mel Gibson, the actor and outspoken Donald Trump fanatic, claimed that methylene blue could cure cancer.

“I have three friends. All of three of them had stage IV cancer,” he said on a January episode of Joe Rogan’s podcast. “All three of them don’t have cancer right now at all.”

While studies on methylene blue show it has a use in treating certain types of cancers, research does not support its use a robust treatment for all cancers, according to The Conversation, which warns, it is “crucial to approach these claims with a healthy degree of skepticism.”

Methylene blue retails for around $30 on Amazon.

Kennedy, who sparked controversy as Trump’s pick for health secretary has yet to be confirmed by the Senate. He has faced concern about his history of pushing health conspiracies, especially the link between vaccines and autism.