If you experience a sudden change in effectiveness after receiving a refill, the pharmacy switch could be a factor worth discussing with your provider
doi: 10.1007/s13402-018-0383-7 40 SuYGuoSLiuCLiNZhangSDingYet al
Crack PJ, Taylor JM, Flentjar NJ, de Haan J, Hertzog P, Iannello RC et al
Under these demanding conditions, L-Glutamine becomes "conditionally essential." This means the body's demand for the amino acid rapidly outpaces its ability to produce it, leading to a state of depletion that can severely compromise various physiological systems if not addressed through targeted supplementation or specific dietary interventions
There is a further complication
Evaluation of oxidative stress mechanisms and the effects of phytotherapic extracts on Parkinsons disease Drosophila PINK1(B9) model