Alcohol companies have been bracing for a culture shift. Their nonalcoholic options have buoyed sales.

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• Major alcohol companies have been bracing for a culture shift favoring nonalcoholic options.
• Younger consumers under the age of 30 buy less alcohol and drink less often.
• Brands like Heineken and AB InBev have rolled out their own alcohol-free offerings, bolstering sales.

Even before the Surgeon General on Friday warned that alcohol can cause cancer and should come with a warning label, big companies like Heineken and AB InBev — the...