The Analog Blog
Evidence-based perspectives on precision medicine, longevity, genomics, and what it means to optimize your health.
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Silicon Valley's $14 billion bet on disrupting healthcare should concern you. Expanding on The Economist's March 2026 feature — and what physician-led precision medicine offers instead of VC-backed diagnostic platforms and AI-first primary care.
I Spent Twenty Years Watching People Almost Die. Here's What I Should Have Done Sooner.
A confession from an emergency physician. After two decades in ERs and ICUs, Dr. RP reflects on what conventional medicine misses — and why he founded Analog Precision Medicine to close the gap between where disease starts and where medicine typically meets it.
What Is Precision Medicine — And Why Should It Change How You Think About Your Health?
Conventional medicine was designed for the average patient. Precision medicine takes that problem seriously — treating you as a biological individual, not a statistical category. A deep dive into the science: genomics, proteomics, pharmacogenomics, metabolomics, and advanced imaging.
GLP-1 Agonists: What They Actually Do (Beyond Weight Loss)
Most people know GLP-1 agonists as the weight loss medications. The weight loss is real. But the cardiovascular, kidney, and heart failure evidence from large RCTs is what makes them genuinely significant — and the honest accounting of risks is what responsible prescribing requires.
Thyroid Beyond TSH: Why a Full Panel Changes Everything
TSH is an excellent early warning system for thyroid dysfunction — but it compresses a complex hormonal system into a single number. A physician and former thyroid physiology researcher explains when free T3, free T4, and TPO antibodies change the clinical picture.
What's Wrong With One-Size-Fits-All Medicine
Clinical guidelines are built on population evidence and are genuinely valuable. The problem comes when we apply population averages as if they were prescriptions for individuals. A physician explains what precision medicine is actually trying to recover — and what it honestly can't yet deliver.
Testosterone Replacement Therapy: Evidence, Risks, and Who Is Actually a Candidate
The word testosterone inherited the entire stigma of doping culture. Real patients have paid a real price for it. A physician explains what the evidence actually shows — including the TRAVERSE trial, the largest RCT ever conducted on TRT — and who is and isn't a clinical candidate.
Zone 2 Cardio: Why Slow Running Might Be the Most Powerful Longevity Tool You're Ignoring
The biology of Zone 2 training rewards consistency more than any other quality. The adaptations that show up in an 80-year-old masters athlete aren't from any single training cycle — they're the accumulated result of decades of unremarkable, steady effort. A physician explains the mechanisms, the honest limits, and how to find your zone.
VO2 Max: The Single Best Predictor of Longevity You've Probably Never Measured
VO2 max outperforms cholesterol, blood pressure, and smoking status as a predictor of survival. Most people have never had it measured. A physician and exercise physiologist explains the evidence, the test, and the honest limitations — including what wearables get wrong.
You Are What Your Genes Eat: A Physician's Honest Take on Nutrigenomics
Same meal, different people, meaningfully different outcomes. What nutrigenomics can actually tell you about how your biology handles food — and the well-powered Stanford trial that directly tested one of its biggest claims and came back null.
What Is Epigenetic Age Testing — And Should You Care?
Your biological age can diverge from your calendar age. It's measurable. But the companies selling these tests aren't volunteering the serious limitations around reliability, daily fluctuation, and the absence of clinical standards. A physician's honest look at the science.
Your Annual Labs Are Missing the Point
The standard blood panel ordered at most annual physicals tells you whether something is acutely wrong. It doesn't tell you where your metabolic trajectory is headed. Twelve markers that actually do — along with an honest look at where the science holds up and where it doesn't.
Are You Too Dependent on Protein Supplements? A Physician's Honest Take
The satiety benefits are real. The protein delivery is efficient. But whole foods deliver nutrients, fiber, and bioactive compounds that no bar or powder replaces. A physician's evidence-based breakdown of when supplements help, when they hurt, and what to look for on the label.
What Can Your DNA Actually Tell You — and What It Can't
The public conversation around genetic testing has gotten muddled enough that it's worth mapping out what the science actually supports versus what the marketing implies — from BRCA variants and familial hypercholesterolemia to pharmacogenomics and the hard limits of consumer tests.
Testosterone, DHEA, and the Hormonal Decline Nobody Prepares Men For
Testosterone declines roughly 1–2% per year from a man's mid-thirties. A physician explains the HPG axis biology, what the AUA and Endocrine Society actually require for a diagnosis, the TTrials and TRAVERSE evidence, and why a single morning total testosterone is a poor foundation for clinical decisions.
Polygenic Risk Scores: The Future of Personalized Disease Prediction
Two patients — same age, same blood pressure, same cholesterol — can have coronary artery disease risk profiles that are miles apart because of inherited genomics no standard test reveals. A physician explains what polygenic risk scores can and can't do, and where the clinical value is clearest.
Pharmacogenomics: Why Your Medications Might Not Be Working
The same drug at the same dose produces plasma levels that can differ tenfold between patients — because of genetics. The PREPARE trial showed 30% fewer adverse drug reactions with genotype-guided prescribing. A physician explains the evidence and the case for a one-time preemptive panel.
Sick Care vs. Health Care: Why Your Doctor Only Sees You When You're Broken
Primary care reimbursement funds diagnosing and treating disease that is already present — not the longitudinal, preventive work that happens before any threshold is crossed. A physician explains the structural failure, what a different model produces, and who it matters most for.
What Does 'Optimizing Your Health' Actually Mean?
'Feeling fine' and 'functioning well' are not the same thing. A physician explains what health optimization means at its evidence-based best — and where the concept goes seriously wrong in the hands of supplement marketers and number-chasing clinicians.
The Case for Self-Pay Medicine (And Why It Might Actually Cost You Less)
Administrative costs account for 34% of total U.S. health expenditures. The average primary care wait is 24 days. A physician explains the honest math behind self-pay medicine, who it makes financial sense for, and what the monthly fee actually buys that the insurance system structurally cannot provide.
Insulin Resistance vs. Type 2 Diabetes: The Spectrum Your Doctor May Not Explain
For most type 2 diabetes patients, the process started 10–20 years before diagnosis — with insulin resistance that has no billing code and rarely gets tested for. A physician explains why fasting glucose fails as early detection and what a $25 lab test catches that standard care misses.
Continuous Glucose Monitoring Without Diabetes: Signal or Noise?
A physician who wore a CGM during ER shifts explains the difference between interesting data and clinically actionable data — and why a well-interpreted fasting insulin often tells you more than a $100/month sensor. The answer depends entirely on who's wearing it and why.
Ozempic vs. Wegovy vs. Mounjaro vs. Zepbound: A Clinical Comparison
Same class, different drugs — and the differences matter clinically. Tirzepatide produces greater weight loss; semaglutide has the cardiovascular outcomes data. An ICU physician who watched metabolic disease kill patients during COVID compares the evidence head to head.
Who Is a Good Candidate for GLP-1 Therapy? An ER Doctor's Honest Take
GLP-1 receptor agonists are genuinely remarkable drugs — but remarkable doesn't mean appropriate for everyone. A physician who has managed GLP-1 complications in the ER explains who belongs on these medications, who doesn't, and what a responsible evaluation requires before the prescription is written.
5 Lifestyle Factors That Accelerate Epigenetic Aging — and What to Do About Them
Your biological clock — written in DNA methylation patterns — responds to how you live. A physician identifies the five factors most consistently linked to epigenetic age acceleration and explains why they compound on each other in ways that make the cycle both dangerous and reversible.
Your Chronological Age vs. Your Biological Age: Which One Actually Matters?
The birthday on your driver's license is your chronological age. The state of your cells is your biological age. A physician explains DNA methylation clocks — GrimAge, DunedinPACE — why the gap is modifiable, and how to use epigenetic age as both a motivational device and an outcomes tracker.
IGF-1, Growth Hormone, and the Aging Axis: What the Data Shows
The anti-aging industry built a business on replacing declining GH and IGF-1. The most consistent finding in aging biology tells a very different story. A physician explains the paradox — and why the most effective interventions for this axis require lifting heavy things and sleeping deeply, not a prescription.
Ferritin: Not Just an Iron Number — What It Reveals About Inflammation
Ferritin is cheap, universally available, and grossly underinterpreted. As both an iron storage marker and an acute phase reactant, it offers a window into iron status, inflammatory burden, metabolic health, and genetic risk — but only if someone is actually looking through that window.
The Omega-3 Index: Why This Number Matters More Than Your LDL
Nearly 89% of Americans have omega-3 levels in the highest cardiovascular risk category. A physician explains why the Omega-3 Index predicts broad-spectrum mortality reduction — and why the fish oil debate misses the most important point: you can't know if it's working unless you measure it.
Men's Health After 40: The Hormonal Shift Nobody Prepares You For
Testosterone gets all the attention. But the midlife hormonal shift in men is a coordinated downregulation across multiple interacting systems — testosterone, DHEA, cortisol, thyroid, growth hormone axis — that requires a comprehensive evaluation to understand and address.
The Future of Personalized Medicine: Where We Are and Where We're Headed
Five technologies maturing simultaneously — genomics, proteomics, epigenomics, AI, and continuous biological monitoring — are creating a convergence moment in precision medicine. A physician maps where we are, what the next five years will bring, and why the human element remains irreplaceable.
The Proteomics Revolution: Why Proteins Tell a Different Story Than Your Genes
Your genome tells you what could happen. Proteins — the molecules that actually execute biological function — tell you what is happening right now. A physician explains how large-scale proteomics from a single blood draw is becoming one of the most powerful tools in precision medicine.
Digital Biomarkers: What Your Smartwatch Actually Knows About Your Health
Heart rate variability, SpO2, sleep staging, cardiac rhythm detection — an evidence-based assessment of what consumer wearables can reliably measure, where the data is clinically meaningful, and where it falls short of the marketing claims.
AI-Assisted Diagnosis: Why It Makes Your Doctor Smarter, Not Obsolete
Where AI demonstrably improves clinical performance — medical imaging, ECG interpretation, colonoscopy, clinical benchmarks — and where it fails: training data bias, distribution shift, automation bias. The right mental model is amplification, not replacement.
Sauna and Cold Exposure: What the Evidence Actually Says
Finnish sauna data shows dose-dependent 40% reductions in cardiovascular mortality over 20-year follow-up — among the strongest observational findings for any non-pharmacological health practice. Cold exposure has a real physiological basis but considerably weaker longevity evidence.
Grip Strength as a Mortality Predictor: The Data Is Stronger Than You Think
In the PURE study across 139,691 adults and 17 countries, grip strength was a stronger predictor of cardiovascular mortality than systolic blood pressure. A physician explains why a 30-second hand squeeze predicts your longevity — and what to do with that information.
Metformin as a Longevity Drug: The TAME Trial and What It Means for You
Diabetic patients on metformin have been repeatedly observed to outlive non-diabetic controls. The TAME trial — 3,000 non-diabetics, composite aging endpoint — is the first clinical trial designed to test whether metformin can slow the biological aging process itself.
Rapamycin for Longevity: What the Animal Data Shows and Why Human Trials Are Complicated
Rapamycin is the only drug to date that has reproducibly extended lifespan across multiple genetically diverse species. The ITP mouse data is compelling. The first prospective human longevity trial (PEARL) returned a null result. An honest assessment of where the evidence stands.
NAD+ Supplementation: Separating the Real Science from the Hype
The NAD+ biology is real and the aging rationale is mechanistically sound. The human clinical trials, as of 2025, demonstrate reliable NAD+ elevation and some tissue-level metabolic effects — but do not yet support the broad longevity claims that populate supplement marketing.
Muscle Mass as Medicine: Why Strength Training Is Non-Negotiable After 40
Skeletal muscle is a metabolic organ responsible for 80% of insulin-stimulated glucose uptake, a secretor of neuroprotective myokines, and the primary substrate for metabolic reserve during illness. The data on its relationship to all-cause mortality is among the most consistent in longevity medicine.
Sleep and Longevity: Why Poor Sleep Is Aging You Faster Than Almost Anything Else
Sleep is when your brain clears amyloid-beta via the glymphatic system, your growth hormone resets, and your immune system consolidates. A physician documents the links between poor sleep and accelerated epigenetic aging, cardiovascular risk, insulin resistance, and dementia.
The Hallmarks of Aging: What Science Says Is Actually Driving Your Decline
Aging is not a single process. It is at least twelve overlapping, interacting biological processes — from genomic instability and cellular senescence to inflammaging and dysbiosis — that collectively erode cellular function over time. The López-Otín framework, explained clinically.
The Galleri Test: What We Know, What We Don't, and Who Should Consider It
Galleri screens for 50+ cancer types from a single blood draw using cfDNA methylation — including cancers with no standard screening. A physician explains the PATHFINDER data (43% PPV, ~51% sensitivity), what the test does not replace, and who the right candidates are.
Full-Body MRI Screening: Is It Worth It? An Evidence-Based Assessment
Prenuvo and Ezra have brought whole-body MRI to a health-conscious consumer audience. A physician who has spent decades watching disease present late examines the evidence: 86–91% sensitivity, 30–40% incidentaloma rates, no RCT mortality data, and a clear candidacy framework.