Caught this on La Vanguardia.

The Unsexy Truth About Longevity

If you follow longevity news, you might think that living longer requires a complicated regimen of supplements, fasting schedules, medications and biohacking. But biomedical aging researcher Marta González-Freire argues that the strongest evidence still supports something much less glamorous: sleep well, eat well, stay active and maintain strong social connections.

Muscle is central to healthy aging. As we get older, we gradually lose muscle mass, strength and functional capacity—eventually making ordinary activities such as walking or rising from a chair more difficult. Cardiovascular exercise helps the heart work efficiently, while strength training preserves muscle and reduces frailty. Encouragingly, people can gain muscle even in their 60s, 70s and 80s. It is never too late to begin, although starting earlier is better.

González-Freire is skeptical of using supplements as a substitute for healthy habits. Creatine has a good safety record and proven value in athletic performance, but evidence for its cognitive and anti-aging benefits remains limited. For most sedentary people, walking for 30 minutes will provide greater metabolic and cognitive benefits than taking creatine while remaining inactive.

Magnesium and vitamin D should not be taken indiscriminately either. More is not necessarily better: excessive supplementation can disrupt electrolyte balance or cause dangerous calcium accumulation. Supplements should address an identified need, at an appropriate dose, rather than become a lifelong reflex.

She is similarly cautious about Ozempic as a longevity drug. GLP-1 medications provide important metabolic benefits for people with certain medical conditions, but studies have not established their value in healthy people. Muscle loss is also a significant concern.

Finally, González-Freire emphasizes not only how long we sleep, but when. She recommends protecting the sleep period between roughly 10 p.m. and midnight and aiming for six to eight hours overall.

The message is refreshingly simple: longevity is a long-distance race. Before chasing the newest intervention, master the fundamentals that already work.

There is, however, a legitimate idea underneath it:

• Sleep is governed partly by circadian timing, not merely total hours.
• In most adults, melatonin rises during the evening as darkness signals the brain that biological night has begun.
• Sleeping during one’s biological night generally produces better-aligned, more consolidated sleep.
• Late-night light and irregular schedules can delay melatonin, disrupt the coordination of clocks throughout the body and affect metabolic and cardiovascular function. NIH circadian overview, NHLBI sleep-wake cycle

Observational studies have found the lowest cardiovascular risk among people falling asleep around 10–11 p.m., but they do not prove that those clock hours possess unique restorative powers. European Heart Journal study

The intermittent hypoxia research is interesting from a hormesis standpoint, but “promising” is doing considerable work there. The biological rationale is plausible; the clinical evidence for healthy aging remains preliminary. It certainly isn’t ready to become another longevity practice people adopt at home.

And the sleep claim needs cultural as well as scientific context. Ten o’clock is a social convention, not a biologically magical hour. What matters more is:

• A regular sleep schedule
• Sufficient sleep
• Sleeping during your own biological night
• Limiting bright light late in the evening
• Avoiding chronic mismatch between your internal clock and social schedule

Spain’s late meals and late-night activity can push sleep later, but local light exposure and habitual schedules also influence circadian timing. A Spaniard sleeping consistently from midnight to 8 a.m. may be better rested than an American forcing a 10 p.m. bedtime, lying awake, and rising at 5 a.m. in pursuit of “optimization.”