25 Studien
Forschungsbibliothek
Kuratierte Ergebnisse aus begutachteten Fachzeitschriften zu Langlebigkeit und Gesundheitswissenschaften, bewertet nach Evidenzstärke.
Centenarians Show a Distinct Metabolic Profile Tied to Bile Acids and NAD+
People who live past 100 have a unique metabolic fingerprint. In a study of 213 participants from the New England Centenarian Study, extremely long-lived individuals had higher levels of certain bile acids and lower levels of bilirubin compared to younger controls. Higher bile acid and steroid levels were linked to lower mortality risk. The researchers also built a "metabolomic clock" that estimates biological age, and deviations from it predicted death risk.
Two Opposing Brain Fuel Patterns May Predict Who Keeps Their Cognition With Age
Brain white matter (the wiring that connects brain regions) uses glucose differently depending on where you look. In over 3,000 participants across two studies, higher glucose use in expected areas like the corpus callosum linked to better thinking skills. But higher glucose use in unusual areas like the corona radiata linked to worse cognition, likely a sign the brain is compensating. Over time, people with strong "normal" metabolism and low "compensatory" metabolism declined more slowly.
Blood Proteins May Reveal Two Critical Windows for Frailty Around Ages 50 and 63
A study of over 50,000 UK Biobank participants found 1,339 blood proteins linked to frailty. Researchers built a "proteomic frailty score" that predicted risk for 199 diseases and responded to 84 modifiable risk factors. The most striking finding: frailty-related protein changes showed two distinct peaks, around ages 50 and 63. These windows could represent key moments when biological aging accelerates.
Caloric Restriction Slows Aging Most in the Heart and Metabolism
Cutting calories doesn't slow aging evenly across all organs. In a two-year trial, 185 adults were randomly assigned to caloric restriction or normal eating. The caloric restriction group aged about one year less in their cardiovascular and metabolic systems over 24 months. Kidney aging, however, didn't budge, and liver aging only slowed modestly at the two-year mark.
Vitamin C May Slow Primate Aging by Blocking Iron-Driven Cell Damage
As primates age, iron builds up in tissues and fuels a chain reaction of fat damage in cells. Researchers call this process "ferro-aging" and found that a specific enzyme (ACSL4) drives it. When aged monkeys received vitamin C for over 40 months, it directly blocked that enzyme. The result was reduced tissue damage, better brain and metabolic function, and biological age clocks that ticked backward across multiple organs.
A Newly Found Enzyme Breaks Down NAD+ Inside Mitochondria
Scientists identified a mitochondrial enzyme called SelO that breaks NAD+ into NMN and AMP. This reaction ramps up when mitochondria are working hard, essentially acting as a brake to prevent metabolic overload. It also plays a direct role in fat burning by linking up with fat oxidation enzymes. The mechanism is conserved from bacteria to mammals, suggesting it's been essential for a very long time.
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