Age spots may affect people of all skin types, but they're more common in people with light skin. Age spots: Are flat, oval areas of increased pigmentation; Are usually tan, brown or black; Occur on skin that has had the most sun exposure over the years, such as the backs of hands, tops of feet, face, shoulders and upper back
Fact Sheet: Melatonin. Melatonin is a hormone that helps you fall asleep. It has been taken for years as a supplement to assist with sleep; however, some doctors suggest that we are sabotaging our sleep by overusing it. Posted on 9/24/2012.
Melatonin is the hormone that is most commonly associated with the sleep-wake cycle. Levels of melatonin vary throughout the day (and night) which helps regulate circadian rhythms in the body. [14] Melatonin levels are high at night (during sleep) and low during the day (during wakefulness). The levels of melatonin are regulated by the suprachiasmatic nucleus of the hypothalamus which reacts to the amount of light in the environment. So the darker it is outside of the body the more melatonin there is. [15]