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“For many years, the prevailing wisdom has been that heavier loads are always better than lighter loads for building muscle. However, Dr. Schoenfeld's research indicates muscle adaptations can still occur with lighter loads.”

“Lutein and zeaxanthin also have evidence in age-related eye disease, although the AREDS2 trial did not find an additional reduction in progression to advanced macular degeneration in its primary comparison. Magnesium and creatine address different needs.”

“Dr. Attia and Dr. Patrick agree that avoiding low vitamin D status is the clearest goal. Large prospective analyses consistently find higher risk at low 25-hydroxyvitamin D concentrations, while the evidence becomes less certain once people reach sufficiency.”

“In a four-month randomized trial of 88 overweight, untrained middle-aged adults, daily doses of 500 or 1,000 milligrams improved some muscle and mitochondrial measures, while the primary outcome of peak power did not significantly improve.”

“Brief vigorous activity can add another training signal. In more than 25,000 adults who reported no leisure-time exercise, several one- to two-minute vigorous lifestyle bouts per day were associated with lower all-cause, cardiovascular, and cancer mortality during follow-up.”

“Assessing and quantifying the exposome — all of the non-genetic tangible exposures we experience during a lifetime, including those from the air, physical surroundings, microbes, and chemicals — is challenging.”

“As older adults get vaccinated, monthly hospitalization rates are trending younger. Some people worry about vaccine side effects, but studies show that the relative risk of these same outcomes is greater if the person is infected with SARS-CoV-2.”

“Dr. Elinav describes that urbanization profoundly reduces microbial diversity by almost 10-fold compared to people living in hunter-gatherer populations. In this clip, Dr. Eran Elinav highlights several factors that contribute to a diverse microbiome.”

“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.”

“McGlory and Patrick explore the critical need for well-funded, well-designed studies to substantiate these observations and guide clinical practice. In this clip, Dr. Chris McGlory defines the importance of preloading omega-3s and suggests that effects may require higher doses.”