The major genetic risk factor for Alzheimer's disease, present in about two-thirds of people who develop it, is ApoE4, the cholesterol-carrying protein that about a quarter of us are born with. But one of the unsolved mysteries of AD is how ApoE4 causes this risk. Researchers at the Buck Institute have found a link between ApoE4 and SirT1, an "anti-aging protein" that is targeted by resveratrol, present in red wine.
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