A: Dark under-eye circles are usually due to adrenal fatigue. If, however, you think the black circles are from the sea salt you’ve been consuming, please discontinue using it, and see if your symptoms resolve.
If you have been incorporating other new foods into your diet, it is also possible that the dark circles are a sign of you being sensitive to something you are eating. Sometimes, food sensitivities may cause our blood vessels to dilate. Since the skin is so thin, this dilation may result in us having dark areas under our eyes.
Lastly, I also recommend ensuring that you are getting adequate fluids daily.