Which type of foods provide all nine essential amino acids?

Meat is considered a complete protein source because it provides all nine essential amino acids that the human body cannot synthesize on its own. Essential amino acids are crucial for various bodily functions, including muscle repair, enzyme production, and overall cell function. Unlike most plant-based foods, which typically provide only some of the essential amino acids, animal proteins like meats offer a full profile, making them particularly valuable in supporting human health.

In contrast, vegetables, fruits, and nuts often lack one or more essential amino acids, which makes them incomplete protein sources. While certain combinations of plant-based foods can provide a complete amino acid profile (such as rice and beans), they do not individually contain all nine essential amino acids in sufficient quantities. Hence, meats are a straightforward and reliable source of complete proteins necessary for maintaining various bodily functions.