"마사" refers to a traditional Korean dish made from fermented soybean paste, known as 된장. It is often used as a base for soups, stews, and marinades, providing a rich umami flavor. The fermentation process enhances its nutritional value, making it a staple in Korean cuisine. In addition to its culinary uses, "마사" can also refer to the practice of using fermented soybeans in various health and beauty products. The probiotics found in fermented foods like 된장 are believed to promote gut health and improve skin conditions, making it popular in both cooking and wellness routines.