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Safety And Tolerability Of Gamma Glutamylcysteine (GGC) Oral Supplementation In MCI Patients

Study For Safety And Tolerability Of Gamma Glutamylcysteine (GGC) Oral Supplementation In MCI Patients

Status
Recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07583251
Acronym
MCI-GSH
Enrollment
9
Registered
2026-05-13
Start date
2026-08-04
Completion date
2027-02-01
Last updated
2026-08-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Mild Cognitive Impairment (MCI)

Keywords

GSH, GGC, MCI, cognitive

Brief summary

The goal of this study is to evaluate the safety and tolerability of Gamma Glutamylcysteine (GGC) supplement at different doses (400mg/day or 800mg/day or 1200mg/day) when administered orally to patients with MCI over 3 months. This study is designed to generate preliminary clinical safety data to inform the feasibility and design of larger controlled trials.

Detailed description

Oxidative Stress (OS) plays a key role in aging and neurodegenerative diseases, including Alzheimer's Disease. The brain's primary antioxidant, GSH, is essential for combating Reactive Oxygen Species (ROS).This study is designed as an open-label, single-center, dose escalation clinical trial to evaluate the safety and tolerability of GGC supplementation in patients with MCI. This will enable the investigators to identify maximum tolerated or recommended dose for further clinical evaluation.

Interventions

400mg capsules once a day

DRUGGamma- Glutamylcusteine

400mg capsules orally (three times) per day

Sponsors

Pravat Mandal
Lead SponsorOTHER
Robert J. Coury Family - Mylan Foundation
CollaboratorUNKNOWN
Inid Research Lab
CollaboratorUNKNOWN

Study design

Allocation
NON_RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
PREVENTION
Masking
NONE

Intervention model description

This study is designed as an open-label, single-center, dose escalation clinical trial to evaluate the safety and tolerability of GGC supplementation in patients with MCI. The participants will be given the GGC supplement: Group A: 400mg once a day/ Group B: 400 mg two times per day/ Group C: 400mg three times a day for three months. Group B starts after Group A's 30-day safety review. Group C starts after Group B's 30-day safety review is cleared. If 1 participant within the cohort(n=3) experiences dose-limiting toxicity (DLT) or clinically significant intolerance, the event will be reviewed by the clinician for severity, relatedness, and significance. Dose escalation may proceed if the event is not indicative of an overall safety concern (Creatinine not more than 1.5mg/dL, AST and ALT levels not more than 1.5 X ULN).If 2 or all of the participants experience DLTs or clinically significant adverse events related to the study supplement, dose escalation will be halted.

Eligibility

Sex/Gender
ALL
Age
55 Years to 80 Years
Healthy volunteers
No

Inclusion criteria

1. Memory complaints; 2. MCI diagnosis 3. MoCA score between 18-25 4. Age 55 - 80 years old. 5. Ability to read and write in English

Exclusion criteria

1. Subjects with a history of cancer; 2. Subjects with a history of schizophrenia, manic-depressive disorder 3. Subjects on antioxidant therapy (ashwagandha, gingko biloba, N-acetylcysteine or glutathione) 4. Subjects on illicit drug (cocaine, heroin, marijuana, or fentanyl) abuse/dependence;

Design outcomes

Primary

MeasureTime frameDescription
No. of participants with abnormal kidney and liver function tests after 30 days of supplementation.1 monthSafety: Creatinine not more than 1.5mg/dL, AST and ALT levels not more than 1.5 X ULN.
Number of participants with treatment-related adverse events with one dose of GGC as assessed by CTCAE.3 monthsSafety and Tolerability
Number of participants with treatment-related adverse events with two doses of GGC as assessed by CTCAE.3 monthsSafety and tolerability
Number of participants with treatment-related adverse events with three doses of GGC as assessed by CTCAE.3 monthsSafety and tolerabitily
Number of participants with abnormal laboratory test results after 3 months of GGC supplementation.3 monthsSafety and tolerability: The number of participants experiencing clinically significant abnormal laboratory test results (hematology, kidney, and liver function tests) during 3 months of GGC supplementation, compared with baseline.

Secondary

MeasureTime frame
Changes in baseline blood glutathione levels (µmol/l) in people with MCI due to GGC supplementation.3.5 months
Changes in blood iron levels(ng/μl) in people with MCI due to GGC supplementation.3.5 months

Countries

United States

Contacts

CONTACTPravat Pravat K MANDAL
mandalpk@pitt.edu4126999561
CONTACTNazia Pillar
clinic55@pitt.edu878-670-3123
PRINCIPAL_INVESTIGATORPravat Mandal, PhD

University of Pittsburgh

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Aug 8, 2026