Related Episodes for How Stimulants Change Motivation and Focus

“Longer-term nutrient status offers another perspective: in a randomized trial of adults with overweight or obesity, 15 grams of psyllium daily for three months did not significantly alter serum micronutrient concentrations relative to control.”

“Certain lifestyle behaviors, such as napping, caffeine consumption, late-night use of electronic devices, and a host of other bad habits, can make falling and staying asleep difficult.”

“If you have used a consumer genetic testing service like 23andMe or AncestryDNA and want to learn more about whether or not the data indicates your specific genotype on these SNPs, check out our free viral report here.”

“The most compelling human signal appears when the brain is under acute strain. In a randomized crossover study, a single dose of 0.35 grams per kilogram during 21 hours of sleep deprivation changed cerebral energy metabolites and preserved selected measures of cognitive performance.”

“A recent meta-analysis also found small benefits in selected cognitive domains, including memory and processing speed, with responses that may depend on age, diet, baseline stores, stress, dose, and the cognitive test used.”

“A separate six-week randomized study in 30 healthy young adults found that neither 10 nor 20 grams per day improved the tested cognitive outcomes compared with placebo. The result is an important counterweight to the acute sleep-deprivation experiment.”

Dan Pardi: Ph.D. candidate studying sleep neurobiology at Stanford and University of Leiden, co-founder of Dan’s Plan online wellness company.

“While some forms of Parkinson's disease are genetic, most cases involve a complex interaction between genetic and environmental risk factors. In the early 1980s, intravenous drug users inadvertently injected a contaminated drug and developed parkinsonian symptoms overnight.”

“Sprint-interval exercise improved reaction time on selected executive-function tasks for about 10 to 30 minutes in a controlled study, supporting Dr. Patrick's practice of using a short workout before an early talk or demanding meeting.”

“Dr. Patrick then prioritizes lower-glycemic-load, less-refined foods and adequate fiber. Early time-restricted eating can help some people reduce calories and may influence selected metabolic markers, but it is not required and must still preserve protein and diet quality.”