This week, science again raised a glass to wine -- this time for its potential to help women keep off excess weight. But as wine's health benefits keep making headlines, those who choose not to eat animal products should cast a wary eye on the hidden ingredients in their next bottle. Wine is clarified using a fining process, where sediment, proteins and other particles are filtered out to produce a clear drink with a flavor that's everything from fruity to earthy to multifaceted -- just not rancid or yeasty, two tastes that unwanted extras tend to imbue.