RFK Jr. caught mixing mysterious blue liquid—what is it?

A video of Robert F. Kennedy Jr., one of the most controversial members of Donald Trump’s incoming administration, has gone viral, showing him using a dropper to mix a striking cobalt-blue liquid into his drink.

Speculation quickly spread online about what the future Health and Human Services Secretary was consuming.

While some social media users joked that it was “liberal tears” (a reference to the Democratic Party’s blue color after its devastating loss in the last election), medical experts in U.S. media identified the substance as methylene blue—a cationic dye commonly used in chemistry, medicine, and textile coloring.

Alternative health trend or dangerous practice?

Methylene blue has gained traction in alternative medicine circles, with some claiming it has benefits for treating dementia, Lyme disease, and even cancer. It’s also popular in the biohacking community, where advocates believe it slows aging and boosts cognitive function.

One of its most vocal supporters is actor Mel Gibson, who recently claimed that three of his friends with terminal cancer were “cured” using the substance. His remarks sparked outrage among mainstream medical professionals, who dismiss these claims as unproven. Studies have even suggested methylene blue could potentially cause cancer rather than cure it.

Historically, methylene blue was first used in the late 19th century for dyeing fabrics and was later repurposed as a malaria treatment in 1981. The FDA has approved it for treating methemoglobinemia, a rare blood disorder, but not for anti-aging or cancer treatment.

RFK Jr.’s controversial health beliefs

RFK Jr. has long been a critic of mainstream medicine, frequently pushing conspiracy theories. He has falsely claimed that childhood vaccines cause autism, wants to ban fluoride in drinking water, and once described COVID-19 as a bioweapon that disproportionately affects Black and White populations.

Online support and a bizarre side effect

Despite medical concerns, Kennedy’s use of methylene blue has found supporters online. Dr. Jesse Morse, a self-proclaimed expert on alternative medicine, posted on X that the substance helps with brain fog, energy optimization, aging, concussions, Alzheimer’s, Parkinson’s, mold toxicity, and Lyme disease.

However, one peculiar side effect stands out—those who take methylene blue often end up with bright blue urine.