Diet Comparison

Seven popular diets compared by scientific evidence, macro ratios, nutrient gaps, sustainability, and cost. Filter by your goal to find the best fit.

Mediterranean

The gold standard of research-informed nutrition

Tier A

P: 20%C: 45%F: 35%

Best For

Heart healthLongevityBrain healthInflammation

Not Ideal For

Rapid fat lossVery high protein needs

Key Foods

Olive oilFishVegetablesLegumesWhole grainsNuts

Common Gaps

Vitamin DB12 (if low in meat)

Pros

+Most studied diet with strongest evidence for all-cause mortality reduction
+Rich in polyphenols and anti-inflammatory compounds
+Flexible, enjoyable, and culturally sustainable long-term

Cons

-Not optimized for bodybuilding or high protein goals
-Higher fat content may not suit everyone's digestion

Sustainability

Cost$$$

Full guide →

Ketogenic

Very low-carb, high-fat for metabolic flexibility

Tier B

P: 25%C: 5%F: 70%

Best For

Fat lossBlood sugar controlEpilepsyMental clarity

Not Ideal For

Endurance athletesThose with gallbladder issuesLong-term sustainability

Key Foods

Fatty fishAvocadoEggsNutsNon-starchy vegetablesCoconut oil

Common Gaps

FiberVitamin CMagnesiumPotassiumB vitamins

Pros

+Rapid initial fat loss via glycogen depletion and appetite suppression
+May improve insulin sensitivity and blood sugar control
+Therapeutic for drug-resistant epilepsy (Tier A evidence for this use case)

Cons

-Electrolyte imbalances common ('keto flu')
-Social dining is challenging; sustainability is low for most people
-Fiber and micronutrient gaps require careful planning

Sustainability

Cost$$$

Full guide →

Paleo

Whole foods based on ancestral eating patterns

Tier B

P: 30%C: 30%F: 40%

Best For

Autoimmune conditionsInflammationGut health

Not Ideal For

VegansBudget-conscious eatersEndurance athletes

Key Foods

Grass-fed meatFishVegetablesFruitsNutsSweet potatoes

Common Gaps

CalciumVitamin DFiber (if low in vegetables)

Pros

+Eliminates most processed food by default
+High protein supports satiety and body composition
+AIP variant has evidence for autoimmune conditions

Cons

-Eliminates nutrient-dense food groups (dairy, legumes) without strong evidence
-Can be expensive (grass-fed, organic emphasis)
-Evolutionary argument is scientifically contested

Sustainability

Cost$$$

Full guide →

Carnivore

All-animal-product elimination diet

Tier C

P: 35%C: 0%F: 65%

Best For

Elimination diet baselineAutoimmune experiments

Not Ideal For

Long-term useThose with kidney concernsHeart disease risk

Key Foods

BeefOrgan meatsFishEggsBone brothButter

Common Gaps

Vitamin CFiberFolatePotassiumPolyphenols

Pros

+Effective as a short-term elimination diet to identify food sensitivities
+Very high protein supports satiety
+Anecdotal reports of autoimmune symptom improvement

Cons

-No long-term RCTs — evidence is largely anecdotal
-Eliminates fiber, polyphenols, and prebiotic compounds critical for gut health
-Potential increased cardiovascular risk from saturated fat intake

Sustainability

Cost$$$

Full guide →

Plant-Based

Whole-food, predominantly or fully plant-based

Tier A

P: 15%C: 55%F: 30%

Best For

Heart healthLongevityEnvironmental sustainabilityBlood pressure

Not Ideal For

Muscle buildingThose with legume/grain intolerances

Key Foods

LegumesWhole grainsVegetablesFruitsNutsSeedsTofu

Common Gaps

B12IronZincOmega-3 DHACreatineVitamin D

Pros

+Strong evidence for cardiovascular health and blood pressure reduction
+Highest fiber intake of all diets, supporting gut microbiome diversity
+Most environmentally sustainable and cost-effective

Cons

-B12 supplementation is mandatory; protein combining requires planning
-Harder to reach high protein targets (>1g/lb) without supplements
-Some people experience digestive issues from high legume/grain intake

Sustainability

Cost$$$

Full guide →

High Protein

Protein-prioritized for body composition

Tier A

P: 40%C: 30%F: 30%

Best For

Muscle buildingFat lossAthletic performanceSatiety

Not Ideal For

Those with kidney diseaseGout (high purine intake)

Key Foods

ChickenFishEggsGreek yogurtWhey proteinLegumes

Common Gaps

FiberVitamin CCalciumPotassium

Pros

+Strong evidence for muscle preservation during fat loss (caloric deficit)
+Highest thermic effect of food — burns more calories during digestion
+Most satiating macronutrient, reducing overall calorie intake

Cons

-Requires intentional fiber and vegetable intake to avoid micronutrient gaps
-Can be monotonous without meal planning variety
-Higher food cost (protein sources are typically more expensive)

Sustainability

Cost$$$

Full guide →

Intermittent Fasting (16:8)

Time-restricted eating for metabolic health

Tier B

P: 25%C: 40%F: 35%

Best For

Fat lossInsulin sensitivityAutophagySimplicity

Not Ideal For

Pregnant/nursing womenHistory of eating disordersHard gainers

Key Foods

Any whole foods during eating windowWaterBlack coffeeBone broth

Common Gaps

Depends on food quality during eating window

Pros

+Simple to follow — focus on timing, not food restriction
+Evidence for improved insulin sensitivity and cellular autophagy
+Often reduces overall calorie intake naturally

Cons

-May not suit people who train early in the morning
-Can promote overeating during the eating window
-Social meals (breakfast with family) may conflict with fasting window

Sustainability

Cost$$$

Full guide →

How We Rate Evidence

Tier A

Multiple large-scale RCTs, systematic reviews, or meta-analyses with consistent results. Strong confidence in health outcomes.

Tier B

Smaller RCTs, observational studies, or emerging evidence. Promising results but more research needed for definitive conclusions.

Tier C

Limited to case studies, anecdotal reports, or preclinical data. May have therapeutic use cases but lacks robust long-term human trials.

Frequently Asked Questions

Which diet has the most scientific evidence?

The Mediterranean diet and plant-based diets have the strongest evidence (Tier A) from large-scale, long-term randomized controlled trials. Both are associated with reduced cardiovascular disease, cancer risk, and all-cause mortality.

What is the best diet for fat loss?

Any diet that creates a sustained caloric deficit will produce fat loss. High-protein diets have the best evidence for preserving lean mass during a deficit. The best diet is the one you can adhere to consistently.

Is the keto diet safe long-term?

Keto is well-studied for short-term fat loss and epilepsy management (Tier A for epilepsy). Long-term safety data (5+ years) is limited. Common concerns include electrolyte imbalances, fiber deficiency, and potential cardiovascular risks from high saturated fat intake.

Can I combine intermittent fasting with other diets?

Yes. Intermittent fasting is a meal timing strategy, not a food restriction plan. It pairs well with Mediterranean, high-protein, or keto approaches. The key is ensuring adequate nutrition during your eating window.

How do I choose the right diet for my goals?

Use the goal filter tabs above to narrow options. For longevity, Mediterranean or plant-based. For fat loss, high-protein or keto. For performance, high-protein or Mediterranean. For gut health, Mediterranean or plant-based. A CryoCove coach can help personalize further.

Related Guides

Macro Calculator

Calculate your daily macros for any diet approach.

Meal Plan Generator

Get weekly meal plans for your chosen diet and goal.

Nutrition Guide

Deep dive into research-informed nutrition principles.

Fasting Guide

Protocols, benefits, and how to combine fasting with any diet.

Not Sure Which Diet Is Right for You?

CryoCove coaching includes personalized nutrition programming based on your bloodwork, goals, lifestyle, and preferences — not a one-size-fits-all diet.

Apply for Coaching

How We Rate Evidence

Tier A

Multiple large-scale RCTs, systematic reviews, or meta-analyses with consistent results. Strong confidence in health outcomes.

Tier B

Smaller RCTs, observational studies, or emerging evidence. Promising results but more research needed for definitive conclusions.

Tier C

Limited to case studies, anecdotal reports, or preclinical data. May have therapeutic use cases but lacks robust long-term human trials.

Frequently Asked Questions

Which diet has the most scientific evidence?

What is the best diet for fat loss?

Is the keto diet safe long-term?

Can I combine intermittent fasting with other diets?

How do I choose the right diet for my goals?