Pumpernickel Bread from Mestemacher — The Lifestyle Bakery. Made with locally grown whole grains and ground at Mestemacher Mill, this nutritious bread supports a healthy diet and will provide the natural power you need to fuel your day. Each loaf is preservative free, high in fiber, and ethically made. Mestemacher Pumpernickel Bread supports a keto diet and can serve a variety of purposes — try a healthy open faced sandwich or a hearty breakfast toast. Mestemacher Pumpernickel Bread will keep you going with natural grain goodness.