Unfortunately, many of the spaghetti sauces on the shelf contain soybean oil these days. Soybean oil has no place in Italian food, as anyone of that variety could tell you. Olive oil belongs in sauce. If you're wondering why you have so much gas or erratic bowel movements, perhaps your sauce is what's to blame. I've even read on my Internet intelligence service that soy has estrogen mimicking properties. Estrogen is a female hormone and development of breast tissue may occur if you drink about three quarts of soy milk per day. Who knows? I'm not about to try it.