Glutamic acid is one of 20 amino acids - amino acids are the building blocks of protein and can be classified as essential or non-essential. There are nine essential amino acids, so-called because it’s essential that we get them from our diet because the body cannot manufacture them itself.
The rest are non-essential because it’s not so important to get them from our diet since the body can manufacture them.
Those with extra protein needs, such as those who exercise a lot or lead a very active life should make sure they’re eating enough protein rich foods that contain all amino acids, including glutamic acid.
Good food sources of natural glutamic acid include meat, fish, eggs and dairy products. For those on a vegetarian or vegan diet, good plant-based sources of glutamic acid include soya and soya products such as tofu, beans, lentils, peas, oats and spirulina, a type of blue-green algae ideal for adding to smoothies.