Pharmaceutical-Grade. EAA Supplement. Density is a laboratory-tested, pharmaceutical-grade essential amino acid (EAA) supplement. Distinguishing features include:. Contains all amino acids considered essential in the adult diet (EAAs). When taken with meals, Density promotes efficient protein utilization by ensuring that all EAAs are present. When taken in between meals, Density promotes greater muscle preservation by helping to keep blood EAA levels from falling. The amino acids in Density require no digestion and are therefore available for immediate absorption.