Robert F. Kennedy, Jr. began the diet about a year ago after meeting Dr. Sean O'Mara, a physician who spent years advising senior government officials, including those in the Bush White House, before transitioning to private practice.
Dr. O'Mara's approach is centered around one key concept: visceral fat is the enemy. This type of fat accumulates around vital organs and contributes to chronic inflammation and heart disease, yet it is not detected on a bathroom scale.
To identify visceral fat, O'Mara uses full-body MRIs, and then he creates a tailored protocol to eliminate it. Following this protocol, Kennedy lost 20 pounds in just 30 days.
Additionally, the diet helped eliminate the atrial fibrillations he had been experiencing and relieved chronic aches and pains that had become a part of his daily life.
Kennedy first convinced Commerce Secretary Howard Lutnick during their December 2025 trip to Colorado, when they discussed diet. Lutnick had been avoiding red meat for years due to concerns about cancer. Now, he is fermenting his own vegetables at home and has replaced Diet Coke with plain iced coffee.
Next, Transportation Secretary Sean Duffy joined the effort. Former House Speaker Kevin McCarthy noticed the changes in Duffy before anyone informed him of Duffy's new lifestyle; he commented on Duffy's glowing skin after spotting him at an event.
Curious about what Duffy was doing, McCarthy asked, and what Duffy shared with him triggered a chain reaction that took everyone in Washington by surprise.
McCarthy is currently following the diet and has lost four inches from his waist.