Direct answer
What does nutritionally engineered mean?
According to Dr. Paul Arciero, nutritionally engineered describes a nutrition system designed around an amino-acid profile. In the interview, he argues that a packaged or powdered format does not by itself determine quality; he focuses instead on the nutrition and amino acids the product is intended to provide.
Direct answer
What makes one protein source higher quality than another?
Dr. Paul frames protein quality around the amino-acid profile and the nutrients supplied, rather than around whether a product is a whole food, powder or supplement. His interview explanation is an educational description of the system discussed with the nutrition coaches and Rick Janson, not a personal product recommendation.
Direct answer
Why do essential amino acids matter?
Dr. Paul explains that essential amino acids are amino acids the body cannot make on its own and must obtain through intake. In the interview, that distinction supports his broader point that protein quality involves more than simply consuming an amount of protein.