Resveratrol is a component found in red wine, grapes and certain berries. There is empirical evidence that suggests that it may support heart health, brain function, and even longevity.

We were two wine writers in Austria’s Wachau Valley powering through a technical tasting of Rieslings, Gruner Veltliners and Gewurztraminers. Or one of us was. I was seated at a table before a sea of ...