a B vitamin (= one of a group of natural substances necessary for good health) found in foods such as eggs, liver (= an animal organ), and yeast (= a fungus that makes bread rise). It helps the body use fats and carbohydrates and is important for healthy hair, nails, and skin.

Peanut butter contains significant amounts of the B vitamins, niacin and biotin, which play an important role in releasing energy and maintaining a healthy skin and nervous system. 花生酱含有大量的B族维生素、烟酸和生物素，它们在释放能量和维持健康的皮肤和神经系统方面发挥着重要作用。