Within the family of nut based oils, pistachio oil is considered a "medium weight oil" in its molecular structure. What that means, is its slightly "heavier" than oils like pecan, but not quite as heavy as macadamia nut oil. The benefits to using a medium weight oil generally deals with absorption thru the skin layers. When you apply pistachio oil to your skin, a percentage will sink in, and a percentage will stay on the surface layers. This quality makes it an excellent blending oil depending upon what formulation you are creating. For instance, if you are designing a nigh time cold cream, I would certainly recommend this oil to be blended into your formulation. Also works great in body scrubs, healing salves, blooming bath oils and let's not forget cold process soaps.