glutathione peroxidase pubmed Measurement of superoxide dismutase, catalase and in cultured cells and tissue Glutathione Peroxidases: An Emerging and
Description
doi: 10.1067/mcp.2001.116514

However, in a few cases blood or urine measurements were not available both pre and post, due to problems including compliance with blood and urine collection, incomplete blood draws, and loss of samples due to shipping or laboratory errors

Your compounded vial is labeled 2.5 mg/mL

Also, thylakoid lumen ascorbate is required for photoprotection via VDE activity (Section 7) and it can act as a electron donor to the photosystems when their function is damaged by stress [213], [214]

Yes, provided you avoid duplication
