Fish is not health food. The truth is fish is an animal muscle made up primarily of proteins and fats, with no carbohydrates or dietary fibers—fish muscles are nutritionally just like the muscles of cows and chickens. They are all loaded with cholesterol and chemical contaminants, and deficient in vitamin C. Fish-fat easily accumulates in the human buttocks, thighs, and abdomen, leading to obesity and type-2 diabetes. All that excess animal protein will cause bone loss (osteoporosis), and the pharmacological activity of the fats (omega-3) will suppress the immune system (cancer and infection) and cause bleeding.
Fostering the myth that fish is a miracle food is a slogan many of us grew up with, “better living through chemistry.” In the case of fish, the miracle chemical is omega-3 fatty acids, which have been advertised to prevent and treat diseases ranging from Alzheimer’s disease to strokes. The most thorough review ever conducted (48 randomized controlled studies of 36,913 subjects) of fish and omega 3 fats on health was published in the April 2009 issue of the British Medical Journal and the authors reported, “Long chain and shorter chain omega 3 fats do not have a clear effect on total mortality, combined cardiovascular events, or cancer.”4 Other research explains the origin of the felonious belief that fish is health food: people who choose fish are the same people who choose an overall healthier diet, consciously avoiding coronary-artery-damaging saturated fats—eating the fish does not prevent heart attacks, it is the not eating beef, chicken, and cheese that saves lives.
-from the June 2009 McDougall Newsletter.