Vitazyme treatment of Cabernet Sauvignon grapes in this California study showed that Vitazyme is capable of increasing grape size, and thus total yield (11% in this test), while not sacrificing the sugar content of the juice. All areas of the vineyard were thinned to achieve a 4 ton/acre yield, so product effects were due to larger fruit. There was little difference in color or quality parameters of the two treatments. The separate wines made from these two treatments will be followed for quality and flavor during the coming months.