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...More than 80 previous studies have found that risk follows a J-Curve, where moderate consumption rewards drinkers with a lower risk ...

So, incidentally, does the risk from ionising radiation. A small but 'greater than safety limits' amount appears to be good for you. Plants raised in a zero-radiation environment grow significantly worse than those in a radiation environment.

I wouldn't be surprised to find that the embarrassing statistical 'glitch' of smokers surviving illnesses better than non-smokers was associated with such a curve.

Of course, the anti-activists are never going to admit this....