Amino Density Formulas Amino Acid tablets or capsules derived from lactalbumin (milk whey) with B-6 Lactalbumin is one of the highest quality proteins available. The P.E.R. of lactalbumin is 3.43 and is the highest in biological value(104). Biological value is defined as "...the amount of nitrogen retained in the body for growth and maintenance in humans." Lactalbumin is one of the highest sources of BCAA's (branched chain amino acids, notably L-Leucine).