Well, they actually can work on your dark circles under the eyes. So just apply them around your eyes. First, you should know that according to some experts, camellia oil is very good for the dark circles under my eyes, because of the elements in them. They are just like many other oils which are not just beneficial for the body health, but also do a good job to the dark circles under eyes. Besides, to reduce the dark circles, there are also some other ways you can have a try. For example, you should change your diet habit, and drink a lot of water. As we know that Water helps in flushing out the toxins from your body which can also result to this condition, it is very good to have a lot of water.