Deep-sea fish oil refers to unsaturated fatty acids extracted from deep-sea fish and animals, which are slightly defatted and charged. As a result of nutrition investigation, it is found that the human body needs unsaturated fatty acids to eat, but the unsaturated fatty acids of modern people exceed the standard. A large number of commercial organizations have developed such supplements, but there is no authoritative data to prove that the products have the function of treating hypertension. In addition, due to the influence of technology, they should be used with caution. It seems that they are mainly responsible for refining a degreased and some water that supplements human nutrition.