Ketogenic (Keto) Diet vs Paleo Diet

Ketogenic (Keto) DietOlive and avocado oil, butter, fatty fish (salmon, sardines), eggs, cheese, nuts and seeds, avocado, poultry and beef, low-carb vegetables (leafy greens, broccoli, cauliflower, zucchini, peppers).

Paleo DietGrass-fed beef, chicken, wild-caught salmon, eggs, almonds, walnuts, pumpkin seeds, berries, apples, leafy greens, broccoli, sweet potatoes, olive oil, avocado.

Ketogenic (Keto) DietBread, rice, pasta, cereal, sugar and sweets, most fruit, potatoes, corn, legumes, most milk.

Paleo DietWheat bread and pasta, rice, oats, beans and lentils, peanuts, milk, cheese and yogurt, table sugar, chips, and packaged snacks.

Ketogenic (Keto) DietNo specific eating window — defined by macro ratios, not meal timing.

Paleo DietNo specific eating window — restricts food categories, not calories, macros, or timing.

Ketogenic (Keto) DietWeight loss / ketosis-driven metabolic shift (clinically, epilepsy management).

Paleo DietGeneral health by cutting processed foods, added sugar, and refined carbs, modeled on ancestral eating.

Ketogenic (Keto) DietPeople who do well with firm food-category rules and don’t mind cutting out entire food groups, more than people wanting a flexible, indefinitely sustainable pattern.

Paleo DietPeople who feel or perform better cutting out processed foods, added sugar, and refined carbs generally, regardless of whether the ancestral framing itself holds up.

Ketogenic (Keto) DietVery high fat (70–80%), low protein (10–20%), very low carb (5–10%, roughly 20–50g net carbs/day).

Paleo DietNone specified — restricts food categories, not macro ratios.

Ketogenic (Keto) DietOriginally developed for drug-resistant epilepsy (still in clinical use); not recommended without medical guidance for pancreatitis, liver or gallbladder disease, certain kidney conditions, pregnancy, or insulin/SGLT2-inhibitor use.

Paleo DietModest improvements in glucose tolerance (small RCT in people with ischemic heart disease), weight, waist circumference, blood pressure, and lipids in a meta-analysis — evidence the study authors themselves call “not conclusive.”

Ketogenic (Keto) DietLimited long-term advantage — meta-analyses show short-term benefits similar to other calorie-restricted diets but no clear long-term edge, with real adherence and safety caveats (LDL increases in some people, dropout as high as 54–91% in some trial arms).

Paleo DietLimited/thinner — real but noticeably thinner and shorter-term than Mediterranean or DASH; a supporting meta-analysis had published calculation-error concerns, and the “one ancestral diet” premise has been directly challenged in the scientific literature.

Ketogenic (Keto) DietHigh — cuts entire food groups; trial dropout reached over half of participants in some studies.

Paleo DietHigh — restricts entire food categories (grains, legumes, dairy) rather than counting anything.

Ketogenic (Keto) DietCost varies widely depending on execution: built on everyday meat, eggs, and vegetables it's comparably priced to a standard diet, but relying on specialty low-carb products like keto bread, pasta, or meal-replacement shakes adds a substantial premium over the same diet made with whole foods.

Paleo DietPaleo-compliant meat, fish, nuts, and produce typically cost more than the grain, legume, and dairy staples it excludes.