Liver HealthMar 15, 2026
Most people only hear about ALT (alanine aminotransferase) when it's elevated, a signal that something may be stressing the liver. But a growing body of research points in the opposite direction: unusually low ALT levels, especially in older or chronically ill adults, can be a quiet marker of frailty, muscle loss, and higher long-term mortality risk. It's not the kind of thing most doctors flag on a routine blood panel, yet multiple large cohorts consistently tie it to worse outcomes.
ALT is an enzyme found mostly in your liver, but also in your muscles. When levels drop below a certain floor, it may reflect that there's simply less metabolically active tissue producing it. That shift matters more than most people realize.
CreatinineMar 15, 2026
"Normal" creatinine depends heavily on your age, sex, and muscle mass. A reading that looks perfectly fine for a 30-year-old man could be a red flag for a pregnant woman or a sign of hidden kidney trouble in someone over 70. This article breaks down what the research says about creatinine ranges across different life stages, why age shifts those ranges, and when you should actually worry about an abnormal result.
AgingMar 15, 2026
Your VO₂max (maximal oxygen uptake, the absolute ceiling on how much oxygen your body can use during all-out exercise) drops roughly 8–10% every decade after your 20s. That rate holds whether you train seriously or barely move. The variable that actually matters is the level you're declining from: endurance-trained adults carry an extra 10–20 mL/kg/min of aerobic capacity compared to sedentary peers at the same age.
That gap is enormous. It can mean the difference between climbing stairs comfortably at 70 and struggling to walk across a parking lot.
Cardiovascular HealthMar 15, 2026
If you have ever looked at a coronary artery calcium score and wondered whether your number is "good" or "bad," the most honest answer is: it depends on how old you are. A calcium score that would be a red flag at 40 might be completely average at 78. That single number on your report does not carry the same weight across every decade of life, and interpreting it without context can leave you either falsely reassured or unnecessarily anxious.
This article will help you understand what the research says about calcium scores at different ages, why a raw number alone is not enough, and how newer tools can put your result into sharper perspective based on your age, sex, and race.
NADMar 15, 2026
When healthy adults received a six-hour intravenous NAD+ infusion, their plasma NAD+ was rapidly cleared. What showed up instead were metabolites in the urine, proving the body processed it but offering no tested clinical benefit. That's a significant gap between what NAD shot marketing suggests and what the research actually supports.
NAD+ itself is genuinely important. It's central to energy production, redox balance, DNA repair, and the activity of sirtuins (enzymes involved in aging and metabolism). Levels decline with age and in conditions like heart failure and neurodegeneration. The logic of boosting it makes sense on paper. The problem is that the leap from "NAD+ matters" to "injecting it helps you" skips over most of the science.
InsulinMar 14, 2026
Over one-third of U.S. nursing home residents with diabetes are managed on sliding scale insulin alone, a method that multiple medical societies have flagged as potentially inappropriate for long-term use. The core problem: sliding scale insulin only reacts to high blood sugar after it happens. It never prevents it. Expert reviews describe the result as a "roller coaster" glucose pattern, and the research consistently shows it leads to worse control and more hypoglycemia than alternatives.
Yet it persists. Understanding why, and when it might still make sense, matters if you or someone you care about is being managed this way in a hospital or nursing home.
Skin HealthMar 13, 2026
Collagen peptide supplements can measurably improve your skin, reduce joint pain, and support bone density. That part is reasonably well established. The part most people miss: benefits took 8 to 12 weeks to show up in clinical trials, depended heavily on co-nutrients like vitamin C, D, and calcium, and the supplements worked best as one piece of a larger strategy, not a magic fix. If you are expecting overnight results from a scoop of powder, you will be disappointed. If you are willing to commit to months of consistent use alongside the right supporting nutrients, the evidence is genuinely encouraging.
Cardiovascular HealthMar 13, 2026
Autopsy and imaging studies find atherosclerotic lesions in the thoracic aorta in the majority of adults. Most of them had no idea anything was building up. Atherosclerosis of the aorta, the progressive accumulation of fatty, inflammatory plaque inside the wall of the body's largest artery, is one of the most common vascular conditions in existence. It is also one of the quietest.
That silence is the problem. By the time aortic atherosclerosis causes symptoms, it has often already contributed to a stroke, an aneurysm, or a clot that traveled somewhere it shouldn't. Understanding where this disease starts, how it progresses, and what actually drives it gives you a real chance to intervene before it reaches that point.
