Unlike other fish, canned tuna showed no benefit for depression in one study, possibly because its mercury content can actually cause depression.

Only about 10% of plant-based omega-3s (ALA) are converted into the EPA and DHA forms the brain actually needs, posing a deficiency risk for vegans.

Many studies linking red meat to disease may be flawed by a 'healthy user bias,' where meat-eaters in the studies also had other unhealthy lifestyle habits.

Saturated fat is particularly problematic when eaten with starches and carbohydrates, but may not be as harmful in other combinations like butter on broccoli.

Beta-amyloid plaques are not the cause of Alzheimer's but rather a side effect of inflammation, and the body's attempt to deal with bad circumstances.

Focus on eating small, cold-water fish known as SMASH—Salmon, Mackerel, Anchovies, Sardines, and Herring—as they are the most nutritionally dense and lowest in toxins.

For the most nutrient-dense option, choose frozen wild blueberries, which can be easily added to a daily smoothie.

Choose 'pasture-raised' over just 'organic' eggs, as organic chickens may still be fed an unnatural diet of corn, which is not what you want them to be eating.