Free Fatty Acids (FFAs)
Your skin needs freely available fatty acids like omega-3s and omega-6s which are the building blocks of healthy cell membranes. Other fatty acids play important roles, so making sure that they are available rather than being bound up is an important consideration.
Although all oils are mainly composed of fatty acids, they are mostly contained in triglycerides. A triglyceride is created when 3 fatty acids combine with a glycerol molecule. They are created in an esterification process and are broken down by the introduction of water via hydrolysys.

Triglycerides keep the oil stable and an excess of FFAs often means that the oil will go rancid quickly, so this balalnce is important. One of the reasons why we favour Rice Bran Oil is that it contains up to 5 times as many FFAs as most other oils whilst being stable, probably due to the presence of oryzanol.