Essential fatty acids (EFAs) are absolutely necessary for life. Sources are from fish, fish oil, flax and oils from other seeds, nuts, and plants. There is an epidemic of essential fatty acid deficiencies in the US. Infant formulas have been deficient in EFAs; we can add fish oil and evening primrose oil to it. EFAs thin blood, prevent rhythm disturbances, reduce inflammation, make healthy cell membranes, increase serotonin levels, and lower triglycerides and blood pressure.