In addition to being a major source of starch and energy, wheat also provides substantial amounts of a number of components which are essential or beneficial for health, notably protein, vitamins (notably B vitamins), dietary fiber, and phytochemicals.
Flour is ground wheat. It's used in many different culinary applications, from baked goods like breads, cakes, and pie crusts to roux for sauces and airy batters. Most conventional flours are made from wheat kernels (or wheat berries), which consist of endosperm, a germ, and bran.
Most wheat is typically milled into flour and is then used to make a wide range of foods including breads, muffins, noodles, pasta, biscuits, cakes, cookies, pastries, cereal bars, sweet and savory snack foods and crackers.