What makes us tick? Our in-built clock - the circadian rhythm - plays a huge role in human longevity. Getting an appropriate amount of sleep while the sun is down has tremendous positive effects on our bodies, according to Dr. Felice Gersh, gynecologist and founder of the Integrative Medical Group of Irvine in Southern California. Sleeping in the dark keeps our body's 24-hour internal clock on track and helps regulate our hormones and metabolism. Still, many people wind up staying up later than they planned, while others work night shift hours, which disrupts our internal clock. In this LLAMA podcast interview with Peter Bowes, Dr. Gersh describes what we can do to regulate our master clock when it is thrown off by lack of sleep or unconventional routines; why it matters for healthy aging and how our meal times could be the solution to night shift fatigue. FlexBeam red light therapyRecharge Health is offering LLAMA listeners an $80.00 discount on the purchase of FlexBeam, the wearable red light therapy device which targets key parts of the body to improve sleep, treat injuries and sooth aches and pains associated with aging.  Use code LLAMA at checkout- DoNotAgeDoNotAge.org is offering listeners to LLAMA a 10% discount on its range of products – NAD boosters, Sirtuin activators, senolytics and more.  Any health queries can be answered by emailing the team at hello@donotage.orgUse the code LLAMA at checkout. - Time-line Mitopure (a highly pure form of Urolithin A) boosts the health of our mitochondria – the battery packs of our cells – and improves muscle strength. Time-line is offering LLAMA listeners a 10% discount on its range of products – Mitopure powders, softgels & skin creams.  Use the code LLAMA at checkout-Support the showThe Live Long and Master Aging (LLAMA) podcast, a HealthSpan Media LLC production, shares ideas but does not offer medical advice. If you have health concerns of any kind, or you are considering adopting a new diet or exercise regime, you should consult your doctor.