Most CBD tinctures use “carrier oils” to dilute their CBD to the milligram concentration shown on the label. 

Although many oils are used as carrier oils, the most popular are MCT (Medium-Chain-Triglycerides) oil and hemp seed oil. 

MCT is a natural oil usually derived from coconuts or palm oil.  Using MCT as a carrier has many purported benefits.  One is faster absorption of CBD.  It contains lauric acid and caprylic acid which appear to give added support to your immune system.  MCT contains antioxidants that may reduce stress levels.  It has been shown to limit bacterial growth giving products longer shelf life.  It is tasteless and odorless.  And research indicates It may contribute to weight loss.

Hemp seed oil has its own unique set of benefits.  Most importantly, it is a source of Omega 3 which improves heart health.  It is often used in skin moisturizers and may aid in getting CBD creams through the skin.  One draw-back is it can have a slightly woody, herby or nutty flavor compared to MCT which is tasteless.  Another is its bioavailability, the ability for absorption by the body, is less than for MCT oil. 

Overall, MCT oil offers the most benefits with the least draw-backs.