As such, it's no surprise that most foods contain some amount of glutamate. Protein foods, such as meat, fish, cheese, milk and some vegetables are especially good sources of glutamate. Not coincidentally, these foods also have a lot of umami taste.ather, the umami taste is one of richness, fullness and complexity. Simply put, it just makes the food taste more delicious. Glutamate's the key The amino acid glutamate could well be called nature's flavor enhancer because it conveys the umami taste in foods.