Protein is a macronutrient - in other words, a compound in food that provides calories and other nutritional benefits.
All proteins are made up of smaller, important compounds called amino acids that serve as the building blocks for your body.
Plant-based proteins are proteins found in plants, the original source of all proteins. It is important to build a plant-based diet around plants high in protein but also either complete or complementary proteins.
To learn more about how much protein you need read the complete article, here.