In this week’s Health newsletter: There’s a critical window for preserving body strength—what age is it? Plus, quitting Ozempic comes with surprising risks, why buy kefir over yogurt, and the progress on curing blindness.  

But first: A new drug could change how we understand sleep. 

Scientists have found a way to restore a missing wakefulness signal in people with narcolepsy. The breakthrough could have implications for understanding—and potentially treating—other sleep disorders.

The fight against frailty can begin decades before physical decline becomes obvious. 

The Surprising Risks of Quitting Ozempic

The Case for Buying Kefir Over Yogurt 

They Were Blinded in Accidents. Now, They Can See Again. 

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