In very old mice, two drugs that clear out "zombie cells", damaged cells that stop dividing but don't die, made the typical mouse live 36% longer after treatment began.
In people, the first trials are small and results are mixed.
Here's what we know.
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Women with breast cancer had used antiperspirant or deodorant no more often than women without, in a 2024 review of 7 studies. All 7 relied on women's memories.
A small 2017 study that disagrees found its link in 18 women with cancer and 9 without.
Here's the breakdown: (1/12)
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A week of camping with no electric light moved people's body clocks about 2 hours earlier, in a small study of 8 adults.
It's the closest thing we have to a test of Andrew Huberman's morning-sunlight advice, and even it doesn't isolate the morning.
Here's the evidence: (1/8)
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About 1 in 6 adults worldwide had obesity in 2024, WHO estimates, up from about 1 in 20 in 1980.
In the US it's about 4 in 10 (41.8%); in Japan, about 1 in 20 (5.2%). Spain: 18.9%, below the WHO Europe average of 23.9%.
The chart shows each country:
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Source: WHO Global Health Observatory (2026), via Our World in Data ourworldindata.org/grapher/s…
Modelled estimates, adults 18+. Obesity = a BMI (kilograms divided by height in metres squared) of 30+. BMI compares populations; it is imperfect for one person.
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In a small study of 60 women, good sleepers' skin barrier, the outer layer that keeps water in, recovered 30% better than poor sleepers' three days after it was stripped with tape.
Good sleepers slept 7 to 9 hours a night; poor sleepers, 5 or less.
A link, not proof.
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Source: Oyetakin-White P et al. Does poor sleep quality affect skin ageing? Clin Exp Dermatol 2015;40:17-22. pubmed.ncbi.nlm.nih.gov/2526…
A small, one-off study in white women, with no follow-up over time. Good sleepers also scored lower on signs of natural skin ageing.
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A 2025 review of 23 trials of collagen supplements (1,474 people) found a benefit for skin only in the industry-funded trials. The rest found no effect.
Its verdict: no evidence in people that they prevent or treat skin ageing. Here's the split: (1/8)
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About half of your body's hyaluronic acid, the molecule that helps skin hold water, sits in your skin.
Yet it was first found somewhere else: in the clear gel inside an eye.
Here's the story: (1/6)
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A tiny protein fragment in young people's blood made old liver tissue act younger, in a lab dish.
By 60, blood holds less than half as much of it as at 20, says a review by its discoverer. Today it's sold in skincare.
Here's the story: (1/7)
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Flies that got little to no sleep lived a normal lifespan, once antioxidants mopped up harmful molecules building up in their gut.
That was flies. A jellyfish with no brain sleeps too, in its way.
So what is sleep for, and could a pill replace it? Here's the breakdown: (1/13)
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We want to solve death. And after that, the possibilities do not end.
First, slow down the speed at which people age. This journey will be hard, and we may fail.
Become superhuman. The Santé manifesto: (1/8)
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