How the diets react
Diet Ratings
Zero net carbs, rich in omega-3 fatty acids (EPA/DHA). Supports cardiovascular and cognitive health on keto. No carbohydrate content.
Derived directly from fish tissues. Fundamentally incompatible with vegan diet which excludes all animal products.
Fish oil is derived from whole fish, a paleo staple. Provides EPA and DHA omega-3s that hunter-gatherers obtained from fish consumption. Minimal processing (extraction from fish tissue) aligns with paleo principles.
Fish oil supplements provide omega-3 fatty acids similar to eating fish 2-3 times weekly. However, the Mediterranean diet emphasizes whole fish consumption for additional nutrients, fiber, and satiety rather than isolated supplements.
Some Mediterranean diet practitioners recommend fish oil supplements for those unable to consume adequate fish, particularly in non-coastal regions.
Animal-derived supplement from fish. Provides omega-3 fatty acids (EPA/DHA) and is widely accepted by carnivore practitioners as a beneficial supplement for micronutrient completeness and anti-inflammatory properties.
Pure fish oil is a natural fat supplement with no excluded ingredients. Compliant as a whole food fat source.
Pure oil with no fermentable carbohydrates. Monash University confirms oils are low-FODMAP at all reasonable serving sizes.
Excellent source of EPA and DHA omega-3 fatty acids, strongly supported by NIH/NHLBI for cardiovascular protection. Low sodium, reduces inflammation and supports heart health.
Concentrated EPA/DHA omega-3s. Dr. Sears explicitly recommends fish oil supplementation for anti-inflammatory benefits. Zero carbs and protein. Perfect fat block component.
Concentrated source of EPA and DHA omega-3 fatty acids, the most bioavailable forms for reducing inflammation. Strongly supported by Dr. Weil and anti-inflammatory research.
Concentrated source of EPA and DHA omega-3 fatty acids, superior to flaxseed oil for cardiovascular and metabolic health. Supports reduced inflammation and may improve GLP-1 medication efficacy. Minimal GI impact when taken with food. Nutrient-dense in small doses.
Controversy Index
Score range: 1–9/10. Higher controversy = more disagreement between diets.