Fish oil is best taken after meals, and it is generally recommended to take it at noon or in the evening after meals. Fish oil is a common health product, rich in unsaturated fat and DHA, which is beneficial for intellectual development. Fish oil has a clear hypolipidemic effect, especially for triglyceride reduction. It is beneficial for the prevention of cardiovascular diseases and atherosclerosis, and some high-risk groups can consider its application. Fish oil is fat soluble and may generally work better when taken after meals. Lipids taken before meals can cause increased secretion of gastric acid stimulation and aggravate gastrointestinal symptoms, especially in patients with underlying stomach diseases, who may experience corresponding symptoms. Although fish oil has certain lipid-lowering effect, it is not a prescription drug and cannot replace drug treatment. If patients are accompanied by some cardiovascular diseases, they also need to apply professional drug treatment under the guidance of doctors.