Which protein are you asking about?
The answer depends on the specific “complete protein” you mean (e.g., egg, whey, soy, pea, gelatin, collagen, a specific supplement, or a drug/biologic product name). Different proteins contain different amino acid profiles.
How to tell if a protein is “complete”
A protein is typically considered “complete” when it provides all essential amino acids (the amino acids your body can’t make in sufficient amounts). If the product’s amino acid breakdown includes every essential amino acid, in adequate amounts, it’s classified as complete.
If the source is plant-based (like many supplements)
Many plant proteins are incomplete or not naturally balanced in one or more essential amino acids. For example, some (such as certain legumes/seed proteins) are often lower in specific essential amino acids unless blended or processed appropriately.
If you share the name, I can answer directly
Tell me the exact protein name (or paste the label’s amino acid list / nutrition facts for that protein), and I’ll confirm whether it includes all essential amino acids.