Yesterday I was talking shop with one of my department colleagues when she suddenly switched the topic: "How much have you lost?" she asked. "Twenty-five or thirty pounds?" I told her it was more like thirty-five or forty, but who was counting. She asked how I was doing it, and I said "low-carb," but before I could elaborate, she added: "It's very important for your back." I gathered that by "your back" she actually meant her own back.  I haven't had any back pain for years, but the … [Read more...]