Glutamic acid is an amino acid that plays a crucial role in the body, particularly in protein synthesis. It is classified as a non-essential amino acid, meaning the body can produce it on its own. Glutamic acid is found in many foods, including meat, fish, eggs, dairy products, and certain vegetables like tomatoes and mushrooms. In addition to its role in building proteins, glutamic acid acts as a neurotransmitter in the brain, helping to transmit signals between nerve cells. It is important for cognitive functions such as learning and memory. Glutamic acid is also a key component of MSG (monosodium glutamate), a flavor enhancer commonly used in cooking.