does lglutamine increase glutathione synthesis from glycine and glutamine; 'retro-control' by How to increase glutathione levels:
Description
Oxidation Decomposition of Unsaturated Fatty Acids by Singlet Oxygen in Phospholipid Bilayer Membranes

10 The final enzyme concentration will need to be pre-determined based on the enzymatic activity ( see Note 6 ), which might vary among preparations/batches

A., Samlan, G., Lohani, M., Thangavel, N., & Al-Kasim, M

IMO might be worth encouraging the doctor to query the lab as to exactly what happened there
