Americans snack nearly as often as they eat regular meals. On any given day, nearly 90% of United States consumers have a snack, a figure comparable to those who eat breakfast (75%), lunch (88%), and dinner (96%), according to research from the International Dairy-Deli-Bakery Association, Madison, Wis. (phone 608-310-5000, www.iddba.org). Combine the frequency of snacking with the growing trend toward leading healthier lifestyles, and it is no wonder that there is an increasing demand for health…