2026
- Evidence · Industry4 min read
The aging clocks respond to interventions. The authors say that is not the same as being right.
Four days after a study explained why epigenetic clocks disagree, a second one — in Nature Medicine today, described by Yale — asks whether they move.
- Follow the Money4 min read
$450 million to pay for marketing, repaid by members: the blood-panel funnel gets its own fund
Function Health, the 160-test membership we wrote about in November, announced $450 million today from a General Catalyst vehicle called the Customer Value Fund.
2025
- Sleep · Evidence4 min read
Melatonin, heart failure, and the number the headline won't give you
The American Heart Association released a study today that will be summarized tomorrow as "melatonin linked to heart failure," and the summary will be both accurate and misleading.
- Supplements · Evidence3 min read
The second shoe drops on taurine: no link to age, muscle, strength or function in people
In June, Science reported that circulating taurine does not decline with age in humans, monkeys or mice, undercutting the premise of a supplement boom that started with a 2023 mouse paper.
- Supplements · Evidence4 min read
Taurine doesn't decline with age after all. Two years, one supplement boom, one correction.
In June 2023, Science published a paper reporting that circulating taurine — an amino acid, best known as an energy-drink ingredient — falls with age, and that supplementing it extended lifespan in worms and mice and improved health markers in monkeys.