Oral Glutathione Supplementation in Older Healthy Adults and Its Effect on the Number of Healthy Days Experienced During Four Months of Supplementation Compared to Placebo

Not Applicable

Completed

• Conditions: Improvement in Immune Cell Function in Elderly Humans
• Interventions: Dietary Supplement: Crystalline Cellulose; Dietary Supplement: Setria glutathione supplement

• Registration Number: NCT02438956
• Lead Sponsor: University of Florida

Brief Summary

A randomized, double blind placebo-controlled parallel intervention in adults over the age of 50 will be performed. Participants will receive a supplement capsule containing placebo (Crystalline Cellulose) or 500mg of Setria® Glutathione to eat for 120 days. Glutathione is hypothesized to replenish the body's reserves that may be depleted through natural aging process, poor diet, or due to the detoxification process for drugs. The primary end point is the number of healthy days experienced during the duration of the study. Secondary endpoints include cellular and biochemical measures from blood samples taken before and after the study.

Detailed Description

The long term goal of this investigation is to understand how food components improve immune function, both in its ability to respond to pathogens and its ability to turn off when the response is no longer needed. The goal of this application is to examine mechanisms by which glutathione improves immune cells after consumption. The central hypothesis is that glutathione improves redox status within the cell, thereby improving cell function and increasing the number of healthy days experienced by the participants.

After obtaining informed consent, human participants will receive 500 mg/day of Setria® Glutathione or placebo for 120 days. Peripheral blood mononuclear cells (PBMC), neutrophils and serum will be obtained from blood draws before and after the 120 days. A daily diary of illness will be kept by each participant and will record any incidence of illness, the number of symptoms per incidence, and the number of days in which symptoms are present. This study is powered on the basis that over 120 days, the glutathione-supplemented group would experience 3% more healthy days compared to the placebo group. The analysis indicated 60 people per group.

Study Timeline

• Study First Submitted: 2015-05-06
• Study First Submitted QC: 2015-05-06
• Study First Posted: 2015-05-08
• Study Start: 2015-10
• Primary Completion: 2016-06
• Study Completion: 2017-09
• Status Verified: 2017-10
• Last Update Submitted: 2017-10-20
• Last Update Posted: 2017-10-24

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 124

Inclusion Criteria

• generally healthy
• must have had at least one cold during the previous year
• age 50-75
• must discontinue other dietary supplement use

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Exclusion Criteria

• on arthritis medication
• on hypertension medication
• severe allergies
• compromised immune system
• high cholesterol, heart failure, angina, etc.
• diagnoses of diabetes or metabolic syndrome

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Crystalline Cellulose	Crystalline Cellulose	looks like and is given in the same way as the experimental treatment but contains no active ingredient
Glutathione supplement	Setria glutathione supplement	500 mg/day Setria glutathione supplement

Primary Outcome Measures

Name	Time	Method
Severity and frequency of Cold / Flu symptoms	120 days	Participants will record any cold / flu symptoms in log throughout the study duration

Secondary Outcome Measures

Name	Time	Method
Improvement of immune cell function	120 days	Increased neutrophil respiratory burst; IFN-gamma and other cytokine production measurements; gd-T cell proliferation in mitogen-stimulated ex vivo culture

Trial Locations

Locations (1)

449 Food Science and Human Nutrition Department, University of Florida; 🇺🇸 Gainesville, Florida, United States