B1, also known as thiamine, is an essential vitamin that's important for energy metabolism. Foods rich in B1 include whole grains, beans, lentils, and pork. Including these foods in your diet can help you maintain good energy levels. Is there a specific reason you're interested in B1 foods? Are you looking to incorporate more of them into your meals? I'd love to hear more about your dietary goals or any other nutrient you're curious about!