“…19,20 The picture becomes even more complex when individual biological variations in rhythms are being taken into account. 21 While a disruption of individual biological rhythms may lead to aging and morbidity, a "reset" of the circadian clock has been predicted to prompt health and to increase lifespans, for example, through feeding regimens that reset the circadian clock and resynchronize in metabolism and physiology. 22 2017 has seen US life expectancy drop for the second year in a row, while lifestyle-associated "civilization diseases" are on the rise, and massively so.…”