Still tired after months on CPAP? The machine fixed your breathing, but the tiredness can stay anyway. Low oxygen from sleep apnea throws off your body clock — the genes that set your daily energy. Two years on CPAP, and those clock genes still haven't fully reset. About 1 in 3 CPAP users stay tired in the daytime, even after the breathing is under control. It's a clock still catching up — not a problem with the machine.

You take vitamin D every day. You've never tested your level. Two people can take the same dose and get different results. One takes 1,000 IU and lands in the ideal range. Another takes 20,000 IU and still tests low. The difference is genetic. A few common gene versions change how your body handles it. They affect how you make it from sunlight, carry it, and switch it on inside cells. Only a blood test shows your number.

I use the words physical hygiene and emotional hygiene. We should pay equally important attention to the hygiene of our emotions. Physical hygiene keeps us physically fit — but full of anger, what use is that? Real hygiene is emotional: peaceful, compassionate emotion. That is the real inner hygiene.

Palestine, gaza 2026. NEVER STOP TALKING ABOUT PALESTINE. If you see this photo, put a dot to break the silence.

With just about every company wanting their employees to use and master #AI and chatbots like Claude and ChatGPT, you might be shocked to learn how few actually do. The reason is resistance and my new @FastCompany article explains why it exists and what it will take to solve it. #Leadership #FutureOfWork #HR #SHRM #Business LINK: buff.ly/q3YOPmY

Future Doctors, Scientists && Leaders "Helping Brilliant Students Develop Real-World Skills, Career Direction & Success Beyond College" Join Free #ILI Masterclass 6/9 indeliblelearning.com/ Good Thursday morning! #Parenting #CareerDiscovery #ThursdayVibes #IndlGIfted #Career

Future Doctors, Scientists && Leaders "Helping Brilliant Students Develop Real-World Skills, Career Direction & Success Beyond College" Join Free #ILI Masterclass 6/3 5:30 pm indeliblelearning.com/ Good Wednesday morning! #MedicalDetective #CareerDiscovery #WednesdayVibes

This is horrific. The Board of Immigration Appeals, having been purged of all dissenters, rules that unaccompanied migrant CHILDREN who initially crossed the border unlawfully MUST be detained without bond, EVEN IF they have been granted Special Immigrant Juvenile Status.

Greatest congratulations!

As little as $7 help someone begin to restore their faith and hope during extraordinarily difficult circumstances. ♥️ Thank you for sharing, @eman_khrais4 Best wishes and post again.

Great memory: A fun fundraiser for my friend’s little opera company. A reminder that art, music, friendship, and a little whimsy are good for the nervous system too. 💜 Enjoy Saturday.

I didn’t think I would ever write something like this… but I don’t have many options left. My name is Eman, I’m a pharmacy student from Palestine, and I’m trying to continue my life under extremely difficult circumstances.

Our latest #ScientificPaper, a great collaboration, has just been #published in the #TransfusionJournal. Thanks to Linda S Barnes DrPH, MHA for the excellent teamwork🎉 #biotherapies #cellulartherapy #AABB #CSM #GTP #PDA #QMS #LeadershipInScience

Every year, I share this video of French caretakers who take sand from Omaha Beach in Normandy, and scrub them into the letters to give them the gold coloring. They do this for all 9,386 US soldiers who died. France also gave us this land as American soil. #MemorialDayWeekend

There are 22 million healthcare workers in America. And I think we just realized how powerful we could become if we stopped letting ourselves stay divided. Something happened in DC this week that was bigger than politics, bigger than titles, and bigger than any one specialty. For the first time in a long time, I sat in rooms with nurses, techs, therapists, physicians, and healthcare workers across every part of medicine, and nobody cared what letters were behind our names. We were united by the same reality: The healthcare system is failing both patients and the people trying to care for them. For years, healthcare workers have been separated into categories, hierarchies, societies, and specialties. But sitting together this week, it became impossible not to ask the question: Why have we been kept so separate? Because divided people are easier to silence and control. But there are 22 million of us. Twenty two million people who see what is happening inside hospitals, clinics, operating rooms, and patient rooms every single day. You can call me whatever you want, but I’m not showing up as “just” a doctor anymore. I’m showing up as a healthcare worker, proud to stand alongside my colleagues at every stage of healthcare. I’m done asking permission to advocate for patients and for the future of healthcare. We know these problems because we are the ones living them. And when healthcare workers unite instead of staying divided, we become something incredibly powerful. Thank you @wearfigs for bringing healthcare workers together in DC this week and helping spark conversations and advocacy that felt bigger than any one title or profession. This is how we change healthcare. Together.

Neuroscience of Nature. Spending time around trees lowers stress-related hormones like cortisol and adrenaline, improves memory, and reduces blood pressure. This is my favorite tree in the neighborhood. Enjoy. ☺️

In medicine, education, research, and life, real growth comes from cont improvement, resilience &doing your best consistently. Important for both youth and adults. Good Friday Morning #FridayVibes #GrowthMindset #MemorialDay #Leadership #SystemsThinking #GiftedEd #WeGrowGeniuses

This one simple thing  increases preemie survival.  No fancy machine or surgery needed. Just basic skin-to-skin contact. It sounds incredible… placing a premature baby directly on a parent’s chest, rapidly improves  vital signs   Heart rate… oxygen levels… even temperature. This is called kangaroo care. And it’s not just for the baby. It improves bonding and calms parents. Human touch is a more powerful medicine than most people realize. So how do you think it works?  #NICU #PrematureBaby #NeonatalCare #Doctor #Medical

The relationship between sleep duration and biological aging just got mapped across nine organ systems—and the pattern is remarkably consistent. A new Nature study analyzed 23 biological aging clocks derived from brain imaging, plasma proteomics, and metabolomics across 500,000 individuals in the UK Biobank. The goal was to determine whether sleep duration shows a systematic relationship with biological age across multiple organs and molecular layers—not just the brain. The result: a U-shaped curve appears across nearly every system measured. Both short sleep (under 6 hours) and long sleep (over 8 hours) are associated with accelerated biological aging compared to the optimal range. The sample-specific minimum biological age gap—the point where aging appeared slowest—occurred between 6.4 and 7.8 hours of sleep per night. That range varied slightly by organ system and sex, but the pattern held across brain structures, metabolic markers, and protein profiles. This isn't a single biomarker showing correlation. It's a cross-organ, multi-omics signal suggesting that sleep duration operates as a systemic regulator of biological aging—not just a neurological phenomenon. The study used generalized additive models to fit the nonlinear relationship without assuming a specific curve shape. The U-shaped pattern emerged independently across imaging-derived aging clocks (MRIBAG), proteomic clocks (ProtBAG), and metabolomic clocks (MetBAG). That consistency across measurement modalities reduces the likelihood that the signal reflects methodological artifact. When three independent molecular and structural aging measures converge on the same sleep duration range, it suggests an underlying biological relationship. Beyond aging biomarkers, the study linked short and long sleep duration to increased risk of systemic diseases: depression, diabetes, ischemic heart disease, and all-cause mortality. Genetic correlation analyses confirmed associations with 527 disease endpoints across multiple organ systems. The distinction between short and long sleep matters. The mechanisms appear different. Short sleep duration showed a more direct association with late-life depression—suggesting that insufficient sleep may produce psychiatric risk through pathways independent of accelerated biological aging. Long sleep duration, by contrast, showed evidence that biological aging clocks partially mediate the pathway to depression. That pattern suggests chronic long sleep may reflect or drive aging processes that then increase vulnerability to mood disorders. The study used Mendelian randomization to test whether diseases causally affect sleep duration. The evidence was weak—suggesting that while disease might influence sleep, the primary direction appears to flow from sleep patterns to health outcomes rather than the reverse. That directionality matters clinically. If sleep duration were primarily a consequence of disease burden, optimizing it would have limited preventive value. But if sleep operates as a modifiable upstream factor—one that influences biological aging across systems—then interventions targeting sleep architecture could alter disease trajectories. The sample-specific optimal range of 6.4 to 7.8 hours is narrower than the broad 7-9 hour recommendation typically cited. Individual variation exists, but the data suggest that consistently sleeping outside this range—whether above or below—compounds biological aging year over year. This shifts the framing of sleep optimization from subjective well-being to quantifiable aging deceleration. The decisions about whether to prioritize sleep duration in the fourth and fifth decades may determine the biological age of organ systems in the seventh and eighth. The relationship isn't linear. Sleeping 5 hours doesn't just subtract proportionally from health compared to 7 hours—it crosses a threshold where multiple aging systems begin accelerating simultaneously. The same appears true beyond 8 hours. That threshold effect means interventions should target the optimal range, not simply more sleep. Chronic long sleep duration may signal underlying pathology or may itself contribute to metabolic and cognitive decline through reduced circadian stimulus and decreased time spent in metabolically active states. One limitation: the study relied on self-reported sleep duration. Self-report captures different aspects of sleep than actigraphy or polysomnography—it reflects perceived sleep rather than objective architecture. The correlation between modalities is only moderate. But the sample size of 500,000 compensates for measurement noise. Even with imperfect individual-level data, population-level patterns emerge robustly when the signal is consistent across organ systems and molecular layers. The practical implication: sleep duration operates as a systemic aging regulator that can be measured, tracked, and potentially modified before clinical disease manifests. Most aging interventions target downstream pathways—inflammation, oxidative stress, mitochondrial function. Sleep duration may modulate all three simultaneously through a single behavioral variable. The question isn't whether sleep matters for aging. The question is whether optimizing sleep duration within the 6.4-7.8 hour range can measurably slow multi-organ biological aging and reduce systemic disease risk across decades. This study suggests the answer is yes.

These are my presently available non-fiction books and novels. New books are coming soon.