Key points from article :
Mice bred to make extra hormone called Klotho lived 30 percent longer.
It also protects mice with symptoms of Alzheimer’s disease from cognitive decline.
Klotho didn’t just protect their brains, it enhances cognition even in young mice.
But scientists not clear on how it works as the hormone doesn’t actually get into the brain.
Some people carry a genetic variation that causes them to produce higher levels of Klotho.
They scored better than average - providing a cognitive buffer to protect from dementia.
The studies were published in JNeurosci and Neurology journal.
