What improves kidney activity, because that causes dark circles under eyes, I heard.
Yes, drink plenty of water - especially effective is the juice of a fresh lemon in a glass of water.
And by all means, cut down on salt. Salt is the worst offender when it comes to 'water retention' - that is, it binds the water in your body and prevents the kidneys from doing their normal cleansing function.
drink water to flush your kidneys
