Related Episodes for Importance of carotenoids for eye health | Bruce Ames

“A later crossover study using a lower weight-based dose found its clearest benefit in reasoning, while several memory, accuracy, fatigue, and sleepiness outcomes did not reliably improve. Routine muscle supplementation and acute sleep-loss research use different protocols.”

“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.”

“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.”

“Longer high-intensity intervals can raise VO2 max efficiently. In a randomized study of 40 healthy, moderately trained men, eight weeks of four four-minute intervals at 90 to 95 percent of maximum heart rate increased VO2 max by 7.2 percent.”

“In 5,107 middle-aged men followed for 46 years, moving from very low fitness into progressively higher categories was associated with roughly two to five additional years of life, and each one-unit increase in VO2 max was associated with 45 more days of longevity.”

“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.”

“The PROT-AGE Study Group recommends at least 1.0 to 1.2 grams of protein per kilogram of body weight per day for most adults over 65 to help maintain lean mass and physical function. Longitudinal evidence connects higher protein intake with better muscle and frailty outcomes.”

“A 2025 network meta-analysis of 217 randomized trials and 15,684 people with knee osteoarthritis found that aerobic exercise was likely the most beneficial exercise category for pain, function, gait, and quality of life.”

“In later randomized trials, urolithin A improved some laboratory measures of muscle endurance or hamstring strength, but it did not significantly improve key primary outcomes such as six-minute walk distance, muscle ATP production, or peak power.”

“Large treadmill cohorts associate higher measured fitness with lower mortality, while a 46-year study of middle-aged men linked the highest fitness category with about 4.9 additional estimated life-years compared with the lowest category.”