D-phenylalanine is believed to increase endorphin levels, which serve as our body’s natural pain relievers, while L-phenylalanine may promote mood improvement as it acts as a forerunner to ...

Purpose: Blood phenylalanine monitoring is critical for ... using a combination of Beckman Coulter's lithium buffers A, D, E, and F (pH range from 2.9 to 3.9) of variable ionic strength and ...