Dihomo-γ-linolenic acid (Standard) is the standard substance of Dihomo-γ-linolenic acid, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. Dihomo-γ-linolenic acid (DGLA) is a fatty acid widely found in plants with antitumor and antiproliferative effects, inhibits the growth of xenograft tumor cells, and can be used in the study of inflammation-related diseases such as rheumatoid arthritis, atherosclerosis, and atopic dermatitis.