Low-FODMAP Diet vs Paleo Diet
A side-by-side comparison — no verdict on which is "better," just how they differ.
Low-FODMAP Diet
A Monash University-developed, three-phase diagnostic elimination diet for irritable bowel syndrome (IBS) — temporary by design, not a general long-term eating plan.
View full Low-FODMAP Diet page →Paleo Diet
Modeled on a presumed hunter-gatherer eating pattern — lean meats, fish, fruit, vegetables, nuts and seeds — excluding grains, legumes, dairy, refined sugar, and processed foods.
View full Paleo Diet page →Typical Foods
Low-FODMAP DietLow-FODMAP alternatives during elimination (e.g. an orange instead of an apple); personalized based on identified individual triggers after reintroduction.
Paleo DietGrass-fed beef, chicken, wild-caught salmon, eggs, almonds, walnuts, pumpkin seeds, berries, apples, leafy greens, broccoli, sweet potatoes, olive oil, avocado.
Foods to Avoid
Low-FODMAP DietHigh-FODMAP foods during elimination: wheat, onions, garlic, certain fruits, dairy, legumes — until the reintroduction phase identifies actual individual triggers.
Paleo DietWheat bread and pasta, rice, oats, beans and lentils, peanuts, milk, cheese and yogurt, table sugar, chips, and packaged snacks.
Eating Pattern
Low-FODMAP DietThree sequential phases: elimination (2–6 weeks), reintroduction (roughly 6–8 weeks, testing FODMAP subgroups one at a time), personalization (ongoing, only actual triggers avoided).
Paleo DietNo specific eating window — restricts food categories, not calories, macros, or timing.
Primary Goal
Low-FODMAP DietDiagnose and manage IBS symptoms (bloating, pain, altered bowel habits).
Paleo DietGeneral health by cutting processed foods, added sugar, and refined carbs, modeled on ancestral eating.
Best For
Low-FODMAP DietPeople diagnosed with IBS or a related functional GI disorder — not intended for people without a GI diagnosis.
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.
Macro Emphasis
Low-FODMAP DietNone — organized around FODMAP carbohydrate content, not macros.
Paleo DietNone specified — restricts food categories, not macro ratios.
Health Condition Relevance
Low-FODMAP DietIrritable bowel syndrome (IBS) specifically — its entire purpose; no evidence supports it as a general “gut health” plan for people without a GI diagnosis.
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.”
Evidence Strength
Low-FODMAP DietStrong for IBS specifically — genuinely strong, randomized evidence (meta-analysis of 10 RCTs, 511 participants), though effect size varies by study.
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.
Restrictiveness
Low-FODMAP DietHigh during the elimination phase (temporary), tapering to low/personalized after reintroduction — meant to be short-term, not permanent.
Paleo DietHigh — restricts entire food categories (grains, legumes, dairy) rather than counting anything.
Cost / Accessibility
Low-FODMAP DietSpecialty low-FODMAP-certified products, gluten-free swaps, and lactose-free items typically cost several times more than their standard counterparts, and getting full benefit from the elimination-reintroduction process usually involves working with a dietitian, an added expense not always covered by insurance.
Paleo DietPaleo-compliant meat, fish, nuts, and produce typically cost more than the grain, legume, and dairy staples it excludes.
Educational only, not medical advice. Want to compare a different pair? Back to Diet Arena.