The mushy pile of seeds, skins and stems left over after grapes are pressed used to be one of winemaking's biggest sustainability problems. But instead of heading to the dump, these days, some grape pomace is being reborn in a host of ways, including a nutrient-packed flour substitute.
Some winemakers, for instance, are using pomace as the basis of grapeseed oil. Researchers are also exploring pomace's properties as a food preservative — studies have shown that compounds called polyphenols found in grapes and in pomace kill bacteria that can cause food to spoil. One Oregon State University professor, Yanyun Zhao, has even toyed with turning pomace into a biodegradable material to make flower pots.