#life-extension

#life-extension

While some other creatures, most notably salamanders and starfish, can regenerate entire limbs, mammals don't have this evolutionary superpower. The big question is: Why are mammals limited?

These findings reposition the thymus as a central regulator of immune‑ mediated aging and disease susceptibility in adulthood.

Asexual reproduction is ultimately unsustainable for mice, and potentially other mammals, too. The clones looked normal and lived as long as normal mice. But large mutations - including the loss of an entire chromosome - accumulated in the cloned lineage at an unusually high rate.

Antibiotics are essential for modern medicine, but bacteria are evolving and developing resistance, turning routine infections into life-threatening conditions. A global analysis estimates that antibiotic-resistant infections could cause over 39 million deaths by 2050.

The Israeli gerontologist has been studying healthy centenarians for years and has observed that many follow a pattern similar to Reichert's. They do not always lead a monastic, carefully balanced life. There is a great deal of biological lottery involved in longevity. But Barzilai wants to hack that lottery—to understand which numbers are the winning ones and pass them on to the rest of humanity.

The AI analysis found enormous variation in the health of the thymus between individual people. In some people, it stayed very active until a very old age. And other people, it actually declined very rapidly at a younger age. Importantly, thymus health correlated with a person's overall health. People who had a healthy thymus tended to live longer, have less cancer, and less cardiovascular disease.

Researchers administered one of four doses of stem cells to 118 people between 70 and 85 years old, all of whom had frailty. In a timed walking test nine months after treatment, those who had received the highest dose could walk about 60 metres farther, on average, than they could before treatment.

Even though you're working out hard, you're just not seeing loss of fat and increase in muscle. Based on his own research and experience, TRT can be almost as significant for middle-aged people as eating protein-rich whole foods or moving enough throughout the day, as testosterone starts declining for most people in their 30s, with more notable symptoms appearing around their 40s or 50s.

We are all going to die. No one is happy about that. Today, the internet is full of claims about diets and supplements that will help us live longer. One writer suggested that there are at least 320 longevity clinics operating around the world; some charge $100,000 or more annually for access to their magic elixirs. Unfortunately, the search for a formula that can prevent death, or delay it for a very long time, has a long history of failures.

"As we get older, the immune system is shifting away from good inflammation," which is the body's short-term, acute response to fend off injury or infection and promote healing, explains Dr. Thomas Marron, one of the researchers leading the new study. Marron directs early phase clinical trials at The Tisch Cancer Institute at the Icahn School of Medicine at Mount Sinai.

Morry Kernerman, an accomplished violin prodigy, commits YouTube recordings of classical music to memory, hikes in a hilly ravine with his son and volunteers to teach music in South America. As he prepares to celebrate his 101st birthday next week, Kernerman is convinced that music has played an outsized role in contributing to his long and active life. The Toronto resident is what's known as a super-ager, someone 80 or up who retains the memory abilities of those in their 40s or 50s.