What are Carrier Oils
When mixing, the effect of the oils does not decrease, but they reinforce each other. By mixing a carrier oil with an essential oil you can also massage a larger part of the body. Except for a few uses and some oils, I always recommend diluting essential oil with a carrier oil. This is to minimize the chance of a reaction of the skin (which can also occur after frequent undiluted use), to prevent overdosing, and because this makes the use cheaper and, as said before, certainly not less.