Any patient with chronic stress, inflammation, gut infection, mould, or poor methylation could be struggling with BH4 depletion
For a closer look at medication considerations, a glutathione medication safety guide is a practical read
This observation, coupled with the added stability contributed by C-terminal amidation and the desire to increase the hydrophobicity of the peptide, led to the generation of a series of compounds with the structure N -acyl-Tyr-Ile-(6) amino-hexanoic amide
J Med Biomed Sci
Exercise capacity was determined by a single maximal exercise test to voluntary fatigue on a motorized treadmill (Exer 3/6, Columbus Instruments) in females [Young ( n = 10), Old Con ( n = 17), and Old mAb ( n = 22)] and males [Young ( n = 10), Old Con ( n = 9), and Old mAb ( n = 9)]