Yeast. Where would be without it? The Red Star and SAF brands are all part of the Lesaffre Group of Companies, http://www.lesaffreyeastcorp.com/about_lyc-na.htm who among other things distribute a yeast that is used by a lot of North American wine makers, which when used in the fermentation process, elimimates the biogenic amines created in the typical red wine production two-stage fermentation process. http://www.vancouversun.com/health/Eureka+Vancouver+scientists+take+headache+wine/4281742/story.html So if you once were adament about avoiding red wine (because of the after-consumption headaches) you now can get fat AND happy, while dipping your warm crusty tuscan loaf into a glass of a big chewy cab-sav. Bon Appetite!