I’ve tried all three—paleo for two years, keto for a year, and carnivore for the past three years. Each taught me something different about my body. Today, I want to give you an honest comparison so you can figure out which approach makes the most sense for your goals, lifestyle, and health situation.
What Each Diet Allows
Paleo focuses on eating what our ancestors supposedly ate: meat, fish, vegetables, fruits, nuts, seeds, and healthy fats. It eliminates grains, legumes, dairy, refined sugar, and processed foods. It’s the most flexible of the three.
Keto prioritizes keeping carbohydrates extremely low (typically under 20-50g daily) to maintain nutritional ketosis. It allows meat, fish, eggs, dairy, nuts, seeds, low-carb vegetables, and healthy fats. The focus is on macronutrient ratios rather than food quality, though many keto practitioners emphasize whole foods.
Carnivore is the most restrictive: animal products only. Meat, fish, eggs, and sometimes dairy. No plant foods whatsoever. It’s simultaneously the simplest and most extreme approach.
Macronutrient Differences
Paleo is moderate-carb (typically 100-150g daily), moderate-protein, moderate-fat. Keto is very low-carb (under 20-50g), moderate-protein, high-fat. Carnivore is essentially zero-carb, high-protein, moderate-to-high-fat. These macronutrient differences create different metabolic states and suit different health goals.
Who Each Diet Suits Best
Paleo suits people who want to improve their diet without extreme restriction, athletes who need more carbohydrates for performance, and those who enjoy cooking with a variety of whole foods.
Keto suits people targeting specific metabolic conditions like insulin resistance, those who want the mental clarity of ketosis with more food variety, and those who enjoy tracking macros.
Carnivore suits people with autoimmune conditions or food sensitivities who need maximum elimination, those who want the simplest possible eating approach, and those who’ve plateaued on other diets and want to reset their metabolism completely.
Pros and Cons of Each
Paleo pros: most socially flexible, abundant food variety, sustainable for most people. Paleo cons: can still include inflammatory foods (nightshades, nuts), may not address severe food sensitivities.
Keto pros: effective for weight loss and metabolic health, mental clarity of ketosis, good research base. Keto cons: requires macro tracking, easy to eat low-quality processed keto foods, can be socially challenging.
Carnivore pros: ultimate simplicity, maximum elimination of potential triggers, dramatic results for many. Carnivore cons: most socially restrictive, limited research, requires commitment during adaptation.
Transitioning Between Them
Many people find success by moving through these diets progressively. Start with paleo to eliminate processed foods. If you want more metabolic benefits, transition to keto. If you have persistent health issues or want the elimination diet effect, try carnivore for 30-90 days and see how you feel. You can always move back to a less restrictive approach, keeping the insights you’ve gained.
Which Is Most Sustainable?
Sustainability depends entirely on the individual. For me, carnivore is the most sustainable because it’s the simplest—no counting, no tracking, no decisions. For others, the variety of paleo or the structured flexibility of keto is more sustainable. The best diet is the one you’ll actually follow consistently. Try each approach and listen to your body—it will tell you which one works best for you.
