Health & Fitness

Types of Diets

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Updated:3/21/2026
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Diet
Type
Focus
Foods Allowed
Foods Avoided
Known For
Mediterranean Diet
BalancedHeart health and longevityOlive oil, fish, vegetables, whole grains, legumes, nutsProcessed foods, red meat (limited), refined sugarsConsistently ranked #1 diet by U.S. News — based on traditional eating in Greece and Italy, reduces heart disease by 30%, UNESCO Intangible Cultural Heritage
Ketogenic (Keto) Diet
Low-carb, high-fatFat burning through ketosisMeat, fish, eggs, cheese, nuts, butter, oils, low-carb vegetablesBread, pasta, rice, sugar, fruit, starchy vegetablesForces the body to burn fat instead of carbs — originally developed in the 1920s for epilepsy, exploded in popularity for weight loss, 'keto flu' is the dreaded first week
Paleo Diet
AncestralEating like our Paleolithic ancestorsMeat, fish, vegetables, fruits, nuts, seedsGrains, legumes, dairy, processed foods, refined sugarThe caveman diet — argues humans haven't evolved to eat modern agricultural foods, eliminates grains and dairy, controversial among nutritionists but popular with CrossFit community
Vegan Diet
Plant-basedNo animal products whatsoeverFruits, vegetables, grains, legumes, nuts, seeds, plant-based alternativesAll meat, dairy, eggs, honey, and animal-derived productsThe strictest plant-based diet — driven by ethics, environment, and health, B12 supplementation is essential, fastest-growing food trend of the 2010s-2020s
Vegetarian Diet
Plant-basedNo meat but allows dairy and eggsVegetables, fruits, grains, legumes, dairy, eggsMeat, poultry, fish, seafoodThe original plant-based lifestyle — practiced for centuries in India and Buddhist cultures, lacto-ovo is the most common variant, easier to sustain than full vegan
Intermittent Fasting
Time-restrictedWhen you eat, not what you eatAny food during eating windowsAll food during fasting periods16:8 and 5:2 are the most popular methods — 16 hours fasting with 8-hour eating window, or 500 calories on 2 days per week, backed by Nobel Prize-winning autophagy research
DASH Diet
BalancedLowering blood pressureFruits, vegetables, whole grains, lean proteins, low-fat dairySodium, saturated fat, added sugars, red meatDietary Approaches to Stop Hypertension — developed by the NIH, proven to lower blood pressure in 2 weeks, consistently rated among the healthiest diets by medical professionals
Whole30
EliminationReset eating habits in 30 daysMeat, seafood, eggs, vegetables, fruit, natural fatsSugar, alcohol, grains, legumes, soy, dairy for 30 daysStrict 30-day reset with zero cheating — one slip and you restart, designed to identify food sensitivities, the reintroduction phase is where the real learning happens
Atkins Diet
Low-carbPhased carb restriction for weight lossMeat, fish, eggs, cheese, butter, oils, low-carb vegetablesSugar, bread, pasta, grains (reintroduced in phases)The original low-carb phenomenon — Dr. Robert Atkins published it in 1972, paved the way for keto, four phases from strict induction to maintenance
Weight Watchers (WW)
Points-basedFlexible calorie managementAny food (assigned point values)Nothing banned, but high-point foods discouragedThe most commercially successful diet program — SmartPoints system makes calorie counting intuitive, celebrity endorsers like Oprah, strong community support through meetings and app
Carnivore Diet
All-meatAnimal products onlyMeat, fish, eggs, some dairyAll plant foods, grains, vegetables, fruitsThe most extreme elimination diet — zero carbs, zero fiber, zero plants, proponents claim autoimmune benefits, controversial and opposed by most dietitians, Joe Rogan popularized it
Zone Diet
Balanced macros40/30/30 carb-protein-fat ratioLean proteins, low-glycemic carbs, healthy fats in precise ratiosHigh-glycemic carbs, processed foods, excess saturated fatPrecise macro balancing at every meal — created by Dr. Barry Sears, popular with CrossFit athletes, uses 'blocks' to measure portions, targets inflammation reduction
Raw Food Diet
Uncooked plant-basedUnprocessed, uncooked foodsRaw fruits, vegetables, nuts, seeds, sprouted grainsAnything cooked above 118°F (48°C), processed foodsBelieves cooking destroys enzymes and nutrients — requires a dehydrator and high-powered blender, extremely labor-intensive meal prep, most adherents are also vegan
Flexitarian Diet
Semi-vegetarianMostly plant-based with occasional meatPrimarily vegetables, fruits, grains, legumes, occasional meat and fishNothing strictly banned, minimizes processed foodsVegetarian without the commitment — coined by dietitian Dawn Jackson Blatner, the most sustainable approach for meat-eaters wanting to eat less meat, no guilt when you have a burger
South Beach Diet
Low-carb, phasedGood carbs and good fatsLean protein, vegetables, whole grains (later phases), healthy fatsRefined carbs, sugary foods, bad fats, alcohol (Phase 1)The friendlier Atkins — created by cardiologist Dr. Arthur Agatston, three phases that gradually reintroduce carbs, emphasizes glycemic index, huge in the early 2000s
MIND Diet
BalancedBrain health and dementia preventionGreen leafy vegetables, berries, nuts, olive oil, fish, whole grainsButter, cheese, red meat, fried food, sweetsCombines Mediterranean and DASH for brain health — studies show 53% lower risk of Alzheimer's, emphasizes 10 brain-healthy food groups, developed by Rush University researchers
Pescatarian Diet
Semi-vegetarianPlant-based plus fish and seafoodFish, seafood, vegetables, fruits, grains, legumes, dairy, eggsMeat and poultryThe easiest bridge from omnivore to plant-based — gets omega-3s from fish, common in coastal Mediterranean and Japanese cultures, easier to get complete protein than pure vegetarian
Gluten-Free Diet
EliminationRemoving gluten proteinRice, corn, quinoa, potatoes, fruits, vegetables, meat, dairyWheat, barley, rye, and all products containing glutenEssential for celiac disease, trendy for everyone else — only 1% of people have celiac disease but gluten-free products are a $7+ billion industry, no proven benefit for non-celiacs
Macrobiotic Diet
Whole-food, plant-basedBalance through whole grains and vegetablesWhole grains (50-60%), vegetables (25-30%), beans, sea vegetables, misoProcessed foods, dairy, most meat, tropical fruits, nightshadesJapanese-inspired philosophy of food as medicine — George Ohsawa brought it to the West in the 1960s, Madonna and Gwyneth Paltrow practiced it, heavily emphasizes brown rice
Anti-Inflammatory Diet
BalancedReducing chronic inflammationFatty fish, berries, leafy greens, turmeric, olive oil, nuts, tomatoesRefined sugar, processed foods, trans fats, excessive alcohol, refined carbsTargets the root cause of many chronic diseases — based on Dr. Andrew Weil's work, overlaps heavily with Mediterranean diet, turmeric and omega-3s are the star ingredients

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