Paleo, keto, Whole30, Mediterranean — they overlap in places and differ in important ones. This hub compares paleo with the other popular approaches so you can choose what fits your goals, honestly and without hype.

These approaches are defined by different things

Most comparisons go wrong because they treat these as competing versions of the same idea. They are not. Paleo is defined by food origin: what a food is and how processed it is. Keto is defined by macronutrient ratio: carbohydrate low enough, and fat high enough, to shift the body toward using ketones for fuel. That difference has a practical consequence people often miss. You can eat paleo at a high carbohydrate intake (plenty of fruit, squash, and root vegetables) and still be entirely paleo, while that same day would not be remotely ketogenic.

Whole30 is different again — it is a 30-day elimination protocol, not a permanent diet. It is stricter than paleo in ways that matter (no added sweeteners at all, and explicitly no recreations of baked goods or treats) and is designed to be followed by a structured reintroduction so you can see what actually affects you. Treating it as a way of eating forever is a misuse of the tool.

Where the Mediterranean pattern genuinely differs

The Mediterranean pattern is the real outlier here, because it includes the things paleo excludes: whole grains, legumes, and moderate dairy, alongside heavy use of olive oil, fish, vegetables, and nuts. It is also the one with by far the largest and longest-running body of research behind it, particularly on cardiovascular outcomes. Anyone comparing honestly has to acknowledge that the evidence base for paleo specifically is smaller and shorter-term than that.

What they have in common is probably the main thing

All four cut ultra-processed food sharply, push cooking from whole ingredients, and increase vegetable intake. A reasonable reading of the research is that a large share of the benefit people experience comes from that shared core rather than from the specific exclusions that distinguish them — which is why individuals often do well on several of them.

The comparisons below go through each pairing in detail. If you have a medical condition, take medication affected by diet, or are pregnant, discuss significant dietary changes with a clinician rather than choosing from an article.

Browse our Paleo vs Other Diets: Honest Comparisons guides

More paleo guides

  • Paleo vs Atkins: Carb Limits, Food Rules and What the Trials Found – Paleo vs Atkins compared: Atkins net carb targets (20, 40, 100 g), paleo food rules, a net-carb table for 15 foods and what the weight-loss trials found.
  • Paleo vs Anti-Inflammatory Diet: Where They Agree, Where They Split, and What CRP Studies Show – Is paleo anti-inflammatory? Compare paleo with the anti-inflammatory diet food by food, and see what four CRP studies found, including the umbrella review.
  • Paleo vs Gluten-Free: Is Paleo Gluten-Free, and Which Gluten-Free Foods Still Aren’t Paleo? – Paleo vs gluten-free: paleo is gluten-free by design, but rice, corn, quinoa, oats and GF bread are not. USDA table, FDA label rule, when to test.
  • Pegan Diet vs Paleo: The Rule Differences, Two Sample Days Counted, and the Evidence Gap – Pegan diet vs paleo: pegan puts plants at 75% and allows beans and some grains; paleo bans both. See the rules side by side and two USDA-counted sample days.
  • The New Food Pyramid vs Paleo: What the 2025-2030 Guidelines Changed, Whether It’s Healthy, and Where Paleo Still Disagrees – The new food pyramid raises protein to 1.2-1.6 g/kg and keeps a 10% saturated fat cap. See what critics say, the fat math, and how paleo compares rule by rule.


    • Research cited in this guide

    We checked this guide against the nutrition and health sources below. They are worth reading for the underlying detail.