You can use it to hide the dark circles under the eyes and to prevent the change of concealer to grayish color just put a small amount below your eyes then apply your concealer after it.
Kerasilk Color Cleansing Conditoner with Keratin and Tamanu Oil. For
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Shine On instantly smooths, conditions and seals in moisture while a
Boost your shower routine, scrub away the day and reveal soft, gl
Hide discoloration with our Lifeproof Color Correctors. Full color c