Kennedy expressed bewilderment during a recent podcast appearance that his boss is among the living, given the chief executive's fondness for fast food and penchant for slurping down Diet Cokes.

"The president," Kennedy told "The Katie Miller Podcast" during Tuesday's episode when asked who in the cabinet had the most "unhinged eating habits."

"The interesting thing about the president is he eats really bad food, which is McDonald's … and Diet Coke," RFK Jr. explained. "He has the constitution of a deity. I don't know how he is alive."

Since Kennedy and Trump forged an alliance between the Make America Healthy Again (MAHA) and the Make America Great Again (MAGA) movements, the health crusader has been visibly irked by the president's love of junk food.

Kennedy has been a staunch critic of fast food and processed foods, spearheading the administration's efforts to push companies to drop questionable additives, including certain artificial dyes, in their products.

Last week, the White House rolled out a new upside-down food pyramid that emphasized the importance of consuming protein and saturated fats.

"When he's at Mar-a-Lago, or he's at the White House, he's eating really good food," Kennedy told host Katie Miller, the wife of White House deputy chief of staff Stephen Miller. "I think if you travel with him, you just get this idea that he's just pumping himself full of poison all day long, and you don't know how he's walking around, much less being the most energetic person."

Trump is famously germophobic, and demands bottles of soda or water be opened in front of him, Washingtonian reported in February 2021.

"He says that the only time that he eats junk food is when he's on the road and he wants to eat food from big corporations because he trusts it," RFK Jr. explained. "He doesn't want to get sick when he's on the road."

In the final weeks of the 2024 campaign, Trump famously worked a shift at a Pennsylvania McDonald's.

After his election victory the following month, the now-79-year-old forced a visibly distraught Kennedy to sheepishly pose with a Big Mac and Coca-Cola during a trip on the soon-to-be 47th president's private plane.