Key takeaways
Three things to remember
- 01
Klotho is a protein made mainly in the kidneys that supports kidney, brain, and vascular health and declines with age.
- 02
Mouse studies show klotho can extend lifespan, but human evidence is observational and does not prove cause.
- 03
You cannot supplement klotho; protecting kidney health and staying active are the practical levers.
How it works
The Mechanism
The gene was named after Clotho, the Greek Fate who spins the thread of life. In 1997 researchers found that mice lacking it aged unusually fast, developing weak bones, stiff arteries, and shortened lives, while mice with extra copies lived roughly 20 to 30 percent longer.
Klotho comes in two forms. The membrane form sits on the surface of kidney cells and acts as a required partner for a hormone called FGF23, which tells the kidneys how much phosphate to clear. The soluble form is clipped off and released into the blood, where it acts like a hormone, influencing insulin signaling, protecting cells from oxidative damage, and keeping blood vessel walls flexible. A small amount is also made in the brain.
Blood klotho tends to fall steadily with age and drops further with kidney disease, chronic inflammation, and diabetes. In animals, restoring klotho improved memory and slowed kidney and vascular decline. Human evidence is mostly observational: people with higher levels, or with a common gene variant that raises them, tend to show better thinking skills and lower mortality risk, but this does not prove that raising klotho causes those benefits.
In practice
Why It Matters
A promising aging marker and research target, not a supplement or a standard lab test.
Klotho ties together kidney health, brain aging, and vascular health, three areas where decline limits healthspan. It is a useful lens for understanding why protecting your kidneys and staying active matters for aging well. It is also a term that supplement marketers borrow, so knowing it is a protein that cannot be taken as a pill helps you spot weak claims.
Common misconception
Some products claim to boost klotho with herbs or capsules. No supplement has been shown to reliably raise klotho in healthy people, and klotho itself is a large protein that would be digested if swallowed. Commercial blood assays also vary between labs, so a single number is hard to interpret.
What moves it
How to Improve It
Exercise regularly. Aim for about 150 minutes of moderate cardio plus 2 to 3 resistance sessions per week; several small studies link activity to higher circulating klotho, though results vary.
Protect your kidneys. Keep blood pressure under 130/80 mmHg and blood sugar controlled, since kidney damage is the biggest known driver of klotho decline.
Limit chronic inflammation. Keep waist circumference in a healthy range and get 7 to 9 hours of sleep, because persistent inflammation is associated with lower klotho in studies.
Hydrate, limit NSAIDs. Drink enough to keep urine pale yellow and avoid daily use of anti-inflammatory painkillers beyond 10 days without medical advice, as both affect kidney load.
Track kidney labs. Check eGFR and albumin at least once a year, since these are validated measures, unlike klotho assays.
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