From the source, fish oil can be extracted from fatty marine fish or freshwater fish, while cod liver oil must be obtained from non-toxic and nutritious deep-sea fish due to its consumption characteristics as a health product; from the production process, when making cod liver oil, one chooses to remove some of the fat in the cod liver, and then adjust it with various nutrients to achieve the most suitable concentration for human intake, and fish oil is directly extracted from fish. From the perspective of main ingredients and effects, fish oil belongs to edible fats in food classification. Edible oils and fats refer to foods mainly composed of fatty acid triglycerides. They are derived from plants or animals or marine organisms and may contain small amounts of other lipids. Certain deep-sea fish oils are processed into health products because they are rich in EPA (known as "blood scavenger") and DHA (commonly known as "brain developer"). The main ingredients of cod liver oil, which people choose to supplement nutrition and fight night blindness, are fat-soluble vitamin A and vitamin D.Guangzhou Changshengkang Biotechnology Co., Ltd. specializes in fish oil and cod liver oil processing !