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" ... Hyperpigmentation: if you think about it in terms of prevention, you might be wasting your time. Dr. Lancer describes it as “a usually harmless excess of brown pigment called melanin that leaves dark spots on the skin.” Causes include exposure to UV light (particularly in those genetically predisposed to freckling) and hormone fluctuations. On the skin, overproduction of pigment shows up as age spots, liver spots, freckles, melasma and dark spots from sun damage. ... "