glutathione and sod Concerted action of antioxidant enzymes superoxide dismutase, catalase, With high bioavailability Glutathione SOD Advanced, 30s (Natroceutics)
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doi: 10.3390/ijms23137196

Studies suggested that prebiotics can influence the GBA and offer great neuroprotection in PD patients (110)

4 Ketogenesis and ketone bodies The proper functioning of the human body is dependent on the energy provided by food (86)

It means it didn't work well enough as a standalone pharmaceutical drug