GSO is carrier oil
See intro sticky (#5 on "What you should know about our products"): http://www.anabolicsteroidforums.com...tion-videos%29
Also it may be confirmed on the source's websiote here (see link) also #5 under the same heading: https://int.basicstero.ws/index/innovations
There ya goI hope that works for you. It flows easy through a 27g from my experience.