Yes, pea protein powder is vegan. However, pea protein powder is not a complete protein source on its own, as it is low in certain essential amino acids. Specifically, pea protein powder is low in the amino acid methionine. To provide a complete source of protein, pea protein powder can be combined with other plant-based protein sources that complement its amino acid profile, such as grains or legumes.
For example, combining pea protein powder with rice protein powder, which is low in lysine but high in methionine, can provide a complete source of protein that contains all of the essential amino acids in the right balance and proportion.
It is important to note that a balanced diet that includes a variety of different protein sources, that can ensure that you are getting all of the essential amino acids that your body needs.