A Hy-Vee supermarket in Urbandale, Ill., sells about 400 half- and full-loaves of sourdough bread every week in four varieties: regular, roasted garlic, rye, and jalapeño-cheddar. The volume sold makes sourdough one of the most popular breads at the store and inspired the store manager to sell sourdough rolls. The Hy-Vee experience is an example of a trend among supermarkets to offer more natural, preservative-free breads. Authentic sourdough is made with only flour, water, and salt, and no other additives or preservatives. According to Mintel, sourdough bread is also a facet of another growing food trend: fermented foods such as sauerkraut, kimchi, and kombucha. About 50 Hy-Vee stores in the Midwest were taught how to make sourdough starter, and now bake the loaves on a regular basis.[Image Credit: © Hy-Vee]