Daytime sleepiness influenced by Vitamin D levels and skin pigmentation
Research on how to increase positive moods and capitalize on your strengths has proliferated, thanks to the positive psychology movement. This research has shed light on ongoing insights into personality, mood, and cognition.
Often referred to as the "body clock", the circadian rhythm is a cycle that tells our bodies when to sleep, rise, eat--regulating many physiological processes. This internal body clock is affected by environmental cues, like sunlight and temperature.