Related Episodes for Tim Ferriss’ personal ketosis biomarkers

“Exposure to bright light also promotes the release of cortisol, and, in turn, the hormone drives wakefulness during the daytime hours. Chronic stress and mis-timed exposure to light can dysregulate cortisol release and promote aging, however.”

“High energy demand is a promising research setting. In a randomized crossover study of 15 healthy adults undergoing 21 hours of sleep deprivation, a single 0.35-gram-per-kilogram dose changed cerebral energy measures and improved selected cognitive outcomes.”

“Time-restricted eating can help some people reduce eating opportunities, although a 12-month trial found no additional weight or body-fat benefit when an eight-hour eating window was added to calorie restriction. Sleep also affects appetite and fat distribution.”

“A systematic review in older adults linked Mediterranean dietary patterns with lower inflammatory markers, while a meta-analysis of randomized trials found that vitamin D supplementation reduced acute respiratory infection risk overall, with the strongest protection among people who were very deficient and received regular doses.”

“This is a proposed metabolic advantage, not proof of slower brain aging. Small TBI trials found that sodium lactate lowered intracranial pressure more than mannitol in severe TBI and improved cognitive scores more than 3% sodium chloride in mild TBI.”

“She uses that result to make consistency practical. Aerobic exercise does not need to be all-out every day, but sessions that raise heart rate and improve cardiorespiratory fitness provide a meaningful brain stimulus.”

“In a randomized crossover study of 18 young men with overweight or obesity, ten three-minute walking or squat breaks spaced every 45 minutes across 8.5 hours lowered post-meal glucose exposure more than uninterrupted sitting or one continuous 30-minute walk.”

“In 15 people with severe traumatic brain injury, sodium lactate infusion increased brain lactate, pyruvate, and glucose without raising intracranial pressure, and a randomized study in 60 patients with mild traumatic brain injury reported better cognitive recovery than hypertonic saline.”

“Mouse studies of feeding during infection also found different responses across bacterial and viral models, so a minimally processed dietary pattern, regular exercise, and normal hydration and nutrition during illness provide a more useful foundation than one universal food or fasting rule.”

“Whereas fasting turns off multiple pathways associated with aging, such as mTOR and IGF-1, eating for optimal fitness activates these important processes. The IGF-1 pathway, in particular, plays key roles in growth and is strongly associated with cancer.”