Well, yes, vitamin c can do a good job to dark circles under your eyes. Other Vitamins that help remove dark circles under eyes are Vitamin K, Vitamin A, Vitamin E and Iron. You should know that Vitamin C increases collagen, removes free radicals from the skin and protects the skin against damage from the sun. All these things work to reduce the appearance of dark under-eye circles. So you can just eat more fruits and some vegetables to intake vitamin c. by the way, relaxing might help remove sources of stress and anxiety that are preventing you from sleeping, eating and resting properly. So that it can relieve the dark circles. Also, cucumber slices have long been used to reduce puffiness and refresh the appearance of skin around the eyes, and then reduce the dark circles. Anyway, you can have a try.