Dr. Robert Kiltz has spent decades helping people overcome fertility challenges, but his impact extends far beyond reproductive health.
As the founder of CNY Fertility, he has been at the forefront of innovative and patient-centered treatments.
His expertise, however, doesn’t stop at fertility—he is also a leading advocate for an animal-based diet, which he credits with transforming his own health and the lives of many of his patients.
During a recent conversation, Dr. Kiltz shared his views on nutrition, longevity, and the misconceptions surrounding dietary health. His core belief is simple: human health thrives on fatty animal foods, not plant-based diets.
Watch the full interview now, or explore the highlights below.
A personal journey to better health
Dr. Kiltz’s interest in nutrition was deeply personal. He watched his sister struggle with diabetes from a young age, which led him to question the root causes of chronic illness.
Despite years of medical training, he was still searching for answers when his own health began to decline. For years, he suffered from arthritis, migraines, kidney stones, and digestive issues.
At 55, he switched to a carnivore diet—and everything changed. “All of it went away,” he said. “My job is to understand why and share that as a doctor.”
Are plants making us sick?
One of Dr. Kiltz’s most controversial claims is that plant-based diets are more harmful than beneficial.
He argues that plants produce natural toxins—such as lectins, oxalates, and phytates—that can contribute to inflammation, autoimmune disorders, and chronic fatigue.
“We’ve been brainwashed to believe plants are good for us,” he said, noting that many of the world’s most addictive and toxic substances, including caffeine, nicotine, and opioids, come from plants.
He challenges the notion that fiber is essential for gut health, questioning its benefits and stating that fiber ferments in the gut, producing alcohol, which he argues is not beneficial for digestion or overall health.
What about nutrients?
Critics often raise concerns about missing nutrients in an animal-based diet, but Dr. Kiltz dismisses these worries.
He emphasizes that humans can get all essential vitamins and minerals from animal products, particularly fatty red meat.
“We don’t have deficiencies—we have poisoning,” he said, explaining that the real problem isn’t a lack of nutrients but the toxic effects of plant compounds.
The carnivore lifestyle
So, what does Dr. Kiltz eat? His daily diet consists of ribeye steak, fatty cuts of meat, eggs, and bacon.
He typically eats one meal a day or fasts for extended periods, believing that humans overeat and that fasting is a natural way to maintain energy and metabolic health.
“Food is the fat on your body, not what’s in your stomach,” he explained, arguing that dietary fat is crucial for longevity.
He dismisses concerns over cholesterol, saturated fats, and red meat, arguing that these fears are based on flawed science.
Instead, he points to the resilience of animals like bears, which survive long periods without food by relying on stored fat.
“Every vitamin, mineral, and amino acid you need is in adipose tissue,” he said, reinforcing his belief that dietary fat is essential for long-term health.
The impact on fertility and health
Dr. Kiltz applies these principles in his fertility practice, where he has seen dramatic improvements in patients who switch to a carnivore diet.
He believes conditions like polycystic ovarian syndrome (PCOS), endometriosis, and poor sperm quality are largely driven by plant-based diets.
“Carnivore works the very best,” he said. “Suddenly people get pregnant, stop miscarrying, and improve their overall health.”
Final takeaways
Beyond nutrition, Dr. Kiltz emphasizes mindset, spirituality, and community as essential components of well-being.
He encourages people to challenge conventional wisdom, take control of their health, and focus on what truly makes them feel good.
“I don’t care about living a long time—I care about having a good time,” he said. For him, that means prioritizing fatty meat, fasting, and staying connected with others.
As he continues to challenge mainstream nutritional guidelines, Dr. Kiltz remains steadfast in his belief that an animal-based diet is the key to optimal health.
