GLA is present in EPO in the form of triglycerides. One such triglyceride in EPO contains two linoleic acid residues and one of GLA. This triglyceride, called di-linoleoyl-mono-gamma-linenyl-glycerol (DLMG), makes up about 18 to 19% of the triglycerides in EPO. GLA is concentrated in the sn-3 position in the triglycerides. GLA is represented by the following chemical structure:
GLA (gamma-linolenic acid)