Vitamin B1, also known as thiamin, plays a crucial role in energy metabolism, helps maintain nerve function and supports a healthy heart. The National Institutes of Health recommends that we maintain adequate levels of thiam in our diet. Thiamin is water-soluble, meaning it isn't stored in significant amounts and any excess excreted in urine. It supports the breakdown and conversion of nutrients into usable energy for cells, and is essential for cognitive function, memory and mood. The recommended dietary allowance for adults is: 3.8 milligrams per serving of pork tenderloin, or 65% the daily value in one serving of lean pork.