If you use the glycein, it will help you make the symptom of dark circles under the eyes not that serious. But it can't be reduced fully. As we know, the glycerin is a kind of organic chemicals. Its main role is to keep the skin moisture. At the same time, the dark circles under the eyes will become bright a little. The glycein can make the eyes part becomes not that dry.
Yes, glycerin can help you reduce the dark circles under your eyes. Generally speaking, glycerins are rich in many nutrients so that it can do a good job to reduce the dark circles under your eyes. So there are many people who try them too. Maybe you can have a try. In addition, Vaseline contains vitamin E and C, so it will make your skin sticky, and in that way, it will also helpful in reducing the dark circles. Besides, lemon juice, olive oil can be good for your eyes, also, there are many other factors that can cause dark circles under eyes, such as the allergy and alcohol, or stress, lack of sleep. For your situation, lack of sleep is the big problem. So you should also pay attention to it. If the situation is serious, maybe you can go and ask the doctor to help you.