I have been blessed with hereditary dark circles (NOT).... and have been dealing with this problem since I was a kid. I have gone to the dermatologist for help, used a million products on the market and never had much luck... until now. I have been using Hylexin for 6 mths. and have noticed that my dark circles have gotton considerably lighter. I know that they will never fully disappear but I would say they have diminished at least 50%.