Too much copper causes oily skin, which can lead to adult acne. Women break out right before their periods because their estrogen levels rise. Copper levels in the body tends to move in tandem with estrogen. As many as 30 percent of women on birth control pills develop a dark pigmentation of the skin, usually around the face. Taking zinc capsules frequently solves the problem.
Excess copper is the culprit.
It combines with the sunlight to create the spots. Vitamin C is essential to maintain skin elasticity. Elevated copper levels reduce the vitamin C content of the skin, causing a loss of normal skin tone. This is one reason why many of the cosmetic companies are adding Vitamin C to their formulas. You can thank elevated levels of estrogen and copper for that.