Niemeyer is largely remembered for his written works, in particular his Handbuch der praktischen Medizin (Textbook of Practical Medicine), which was a very popular medical book in Germany. He is also known for espousing a high-protein, low-carbohydrate diet that was in essence a modification of the popular "Banting diet", a diet endorsed by William Banting (1796–1878), an English undertaker.