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Could one pill help us live longer? Scientists and investors are racing to find a drug to slow aging, trying things like metformin and rapamycin. But the breakthrough might not come from humans.

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A container of blood plasma is being extracted from a centrifuge for a medical procedure
Spinning blood in a centrifuge to remove the plasma can treat certain medical conditions, and some doctors are exploring the benefits for longevity too.
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Two men sit in a pressurized chamber with face masks for hyperbaric oxygen therapy.
Hyperbaric oxygen therapy is a cutting-edge (but costly) longevity treatment. A doctor who researches it said to focus on free lifestyle changes like exercise first.
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A woman on an elliptical.
Amy Hardison, a grandmother of 64, currently holds a top rank in the Rejuvenation Olympics for having slowed her biological aging and improved her health.
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Bryan Johnson.
Bryan Johnson just asked X whether he "peaked" in 2018 or 2024.
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Bryan Johnson
Bryan Johnson is a multimillionaire with an expensive hobby of pursuing longevity.