RFK Jr.’s Carnivore Diet: A Registered Dietitian Weighs In

U.S. Health and Human Services Secretary Robert F. Kennedy Jr. Has publicly shared his experience with the carnivore diet, reporting a loss of 20 pounds in 20 days and a 40% reduction in visceral fat within a month. Although his results have garnered attention, experts caution that this restrictive eating pattern is likely not a sustainable or healthy long-term solution.

What is the Carnivore Diet?

The carnivore diet primarily consists of meat and animal protein. According to Theresa Gentile, MS, RDN, CDN, a registered dietitian and spokesperson for the Academy of Nutrition and Dietetics, the diet is “rich in complete proteins, which contain all the essential amino acids that help build muscle mass.” It can also promote feelings of fullness, support metabolism and stabilize blood sugar levels. The diet is often high in heme iron, zinc, B12, creatine, and omega-3 fats.

Potential Benefits and Drawbacks

While the carnivore diet offers some potential benefits, it also presents significant drawbacks. Gentile notes that it’s “high in saturated fat and cholesterol, and could possibly increase LDL cholesterol, especially for people who already have high cholesterol.” A major concern is the complete lack of fiber, which is crucial for gut health, bowel regularity, and cholesterol and blood sugar control.

RFK Jr. Has incorporated fermented foods into his diet, which can provide some gut-healthy benefits. However, Gentile emphasizes that fermented foods cannot replicate the full spectrum of nutrients found in a variety of fruits and vegetables. “You can’t ‘eat the rainbow’ with fermented foods,” she explains. The diet misses out on essential vitamins, minerals, antioxidants, soluble fiber, and insoluble fiber.

Is Rapid Weight Loss Realistic and Sustainable?

Gentile cautions against expecting the same rapid weight loss results as RFK Jr. Weight loss can occur simply by reducing overall calorie intake. However, she recommends a slower, more sustainable rate of weight loss—one to two pounds per week—to allow the body to adjust and avoid potential negative consequences.

“Losing too much too fast can trigger your body to stop losing weight at some point,” Gentile warns. Rapid weight loss can also lead to micronutrient deficiencies, low energy levels, decreased bowel function, and even hair thinning.

Can You Target Visceral Fat Loss?

RFK Jr. Reported a significant reduction in visceral fat. However, Gentile clarifies that it’s not possible to target specific types of fat loss with any particular diet. “If there were, we would have been doing it already,” she states. Weight loss in general, including visceral fat, is likely a result of overall weight reduction.

The Bottom Line

While protein and fermented foods can be part of a healthy diet, Gentile emphasizes that variety is key. “The ‘RFK diet’ is not a good long-term strategy. It’s not a varied diet and is missing a lot of nutrients.” A sustainable, balanced diet that includes a wide range of foods is essential for long-term health and well-being.

This article is based on an interview with Theresa Gentile, MS, RDN, CDN, a registered dietitian and spokesperson for the Academy of Nutrition and Dietetics.