Wine is touted to have health benefits.  So raise your glass and toast to good health - Friday is National Wine Day.  Case-in-point, drinking a daily glass of red wine is good for the bacteria lining your large intestine.  A new Spanish study suggests that sipping about 9 ounces of merlot, or a low-alcohol red wine, changed the mix of good and bad bacteria typically found in the colon, in ways that can benefit your health.  Bacteria may sound like a bad thing to have in your intestinal tract, but having a balanced mix of them actually helps to digest food, regulate immune function, and produce vitamin k, which plays a key role in helping your blood clot.