Fish oil contains omega-3s that are distinct from the flax-type omega-3s. The fatty acid molecules are longer and more bent. They are predominantly eicosepentenoic acid (EPA) and docosahexaenoic acid (DHA). These are the fatty acids abundant in organisms adapted to the cold, such as cold-water fish and cold-adapted mammals, because they keep the membranes of cells from becoming too stiff when exposed to frigid conditions. Fish obtain EPA and DHA by eating algae that have the flax-type omega-3s typical of plants.
DHA comprises about half of the fatty acids in the brain and is associated with the additional set of health benefits established for omega-3s, notably the protection of the retina, the development of the brain and the prevention of cognitive decline.
The human body can make DHA from the flax-type omega-3s — but not very efficiently. This prompted researchers to recommend obtaining DHA directly, from fish or fish oil. Cardiologists began recommending their patients take 1g per day of combined EPA/DHA. But within only a few years of a megatrend in fish oil, there arose a number of dilemmas. What about sustainability? And where do vegetarians get their omega-3s?
Fish oil contains omega-3s that are distinct from the flax-type omega-3s. The fatty acid molecules are longer and more bent. They are predominantly eicosepentenoic acid (EPA) and docosahexaenoic acid (DHA). These are the fatty acids abundant in organisms adapted to the cold, such as cold-water fish and cold-adapted mammals, because they keep the membranes of cells from becoming too stiff when exposed to frigid conditions. Fish obtain EPA and DHA by eating algae that have the flax-type omega-3s typical of plants.
DHA comprises about half of the fatty acids in the brain and is associated with the additional set of health benefits established for omega-3s, notably the protection of the retina, the development of the brain and the prevention of cognitive decline.
The human body can make DHA from the flax-type omega-3s — but not very efficiently. This prompted researchers to recommend obtaining DHA directly, from fish or fish oil. Cardiologists began recommending their patients take 1g per day of combined EPA/DHA. But within only a few years of a megatrend in fish oil, there arose a number of dilemmas. What about sustainability? And where do vegetarians get their omega-3s?
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