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1 .This is Scientific American 60-Second Science. I'm Christopher Intagliata. Got a minute?
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2 .If you like to wind down with a drink, you've perhaps also rationalized the act with this often repeated claim:
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3 ."You don't have to feel guilty about imbibing a little red or white: in small amounts it is good for your heart."
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4 .But a new study finds that alcohol's supposed benefit may in fact only be available to certain people who happen to have the right genes.
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5 .Researchers studied 600 Swedish men and women with heart disease, and compared them to some 3,000 healthy volunteers.
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6 .They asked the subjects about their drinking, measured their blood cholesterol, and sequenced each subject's version of a gene that governs the transport of cholesterol to the liver.
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7 .Turns out, moderate drinking, a couple of drinks a day appeared to lower heart disease risk overall by 20 percent.
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8 .But subjects who had a specific variant of that cholesterol transport gene, and tipped back a few?
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9 .They had an 80 percent reduction in heart disease risk.
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10 .And the gene variant isn't protective by itself; only when combined with booze.
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11 .The results appear in the journal Alcohol.
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12 .Unfortunately, only about 15 percent of us have this variant.
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13 .Study author Dag Thelle, of the University of Gothenburg, says that past studies which found what looks statistically like a slight heart benefit of moderate drinking in large populations, could actually just be detecting this huge alcohol benefit, in the small, lucky gene group.
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14 .While the vast majority of drinkers get no benefit at all.
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15 .So any message here for drinkers?
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16 ."In my view there is not. Not at this time. It's far too early to say anything."
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17 .The study's too small, he says, and has to be repeated.
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18 .However, "Most of my friends they claim they drink moderately.
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19 .But when I look at them I see there's quite a large variation."
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20 .Before you order that next round, you might wanna take that idea to heart.
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21 .Thanks for the minute, for Scientific American 60-Second Science. I'm Christopher Intagliata.
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