Are Nuts a Complete Protein Source? The Definitive Answer
                                
                                
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                                    4 min read                                
                            
                                Over 90% of plant proteins are considered 'incomplete,' lacking one or more of the nine essential amino acids. When it comes to the question, "Are nuts a complete protein source?", the answer is mostly no, though there are some notable exceptions and important context for plant-based diets.