In National Use of Prescription Medications for Insomnia, appearing in Volume 37, Issue 02 of the journal SLEEP, Harvard Medical School reports that approximately 3.5 percent (nearly six million) U.S. adults admitted to the use of sleeping pills within a one-month period of time. The study, conducted for the years 2009 and 2010, showed an increase over a similar study conducted in 1999-2000 which reported only 2 percent of adults.
Happiness may not come from your family, friends, or wealth, at least according to a new study. Rather, it comes from a peptide.
Led by the University of California Los Angeles, an international team of researchers has linked levels of hypocretin (a human peptide and neurotransmitter) to happiness. They found that the levels of hypocretin soared when we are happy, and also decreased when we are sad.