An expert in the risks of alcohol drank heavily for years. His 'dry by default' rule helped him drink less, lose weight, and live a fuller life.

Richard Piper

• Drinking alcohol in moderation was thought to be healthy, but research now suggests there is no safe level.
• Alcohol harm expert Richard Piper used to drink heavily.
• His 'dry by default' rule helped him reduce the risks of drinking without going sober.

At 52, Richard Piper runs often, feels full of energy, weighs less, and enjoys concerts and holidays more than he did at 42. He...