[ad_1] Some of the natural cures for dark under eye circles that you will read about on the internet should be tried with caution, if at all. Remember that some of these are home remedies people have come up with on their own. Remember, too, that just because a compound is naturally occurring does not mean that it is safe. Menthol is a case in point.Menthol is a naturally occurring substance found in peppermint and other mint oils. In small quantities, it is relatively safe. But, in any quantity, it will irritate the eyes.One of the home remedies mentioned in an internet article suggests the use of Icy Hot to lighten dark circles. One of the active ingredients in all forms of Icy Hot is menthol. The concentration varies, as does the amount of irritation that could occur. But, plain and simple, the product was not designed for this use. It…