Also known as: alpha-klotho, KL protein, soluble klotho, FGF23 co-receptor
Klotho is a large human protein examined in aging and metabolic research. Database records pair it with FGF23 signaling and note enzyme activity toward selected steroid glucuronide compounds in laboratory systems. A form freed by cleavage of the membrane protein is discussed as a circulating factor connected to insulin and IGF1 pathway activity.

PSO vial render · Scientific images from Wikipedia · Tap to enlarge
Klotho enables contact between FGF23 and FGFR1, a pairing tied to renal control of phosphate and vitamin D status. Test system work also records breakdown of several steroid beta D glucuronides. Once the membrane form is cut, the released portion can circulate and is described in relation to insulin and IGF1 linked signaling.
Scientific attention first centered on Klotho through its links to kidney phosphate handling and vitamin D balance. Later curation added details on activity seen in vitro and on its role in helping FGF23 meet its receptor. Ongoing literature keeps placing it where mineral control, liver signaling, and gut pathway discussions overlap.
Community Reports - Not Medical Advice
The following is aggregated from public forums, Reddit, and research communities. These are anecdotal reports from researchers only - not verified clinical data and not a recommendation of any kind.
Klotho (also known as alpha-klotho, KL protein) is studied within the longevity and anti-aging research community. Anti-aging hormone/enzyme studied for cognitive function, kidney health, and extension of healthspan in preclinical models.
Last updated October 28, 2026
Research status: emerging. Klotho appears across longevity and anti-aging research forums and academic literature. Researchers note this compound falls in the anti aging category.
Last updated October 28, 2026
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