Dear Doctor: My husband and I enjoy a glass of wine with dinner. I prefer red wine, but it always gives me a bad headache. It happens from even half a glass, so I know it’s not a hangover. I thought it was the sulfites, but I hear there’s a new theory. Do you know what that is?
Dear Reader: For some people, a glass of red wine is one of life’s small pleasures. For many others, it’s the trigger for …