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Liposomal Glutathione Elevates Glutathione and Immune Function Markers
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Glutathione is a critical antioxidant in human metabolism. Therefore, it is critical that glutathione levels in the body are adequate to combat oxidative stress and chemical exposures. A clinical trial using Tri-Fortify™ liposomal glutathione showed efficacy in raising reduced glutathione levels (GSH) along with natural killer cell function while also decreasing oxidative stress markers:
Abstract
Background/Objectives: Glutathione (GSH) is the most abundant endogenous antioxidant and a critical regulator of oxidative stress. Maintenance of optimal tissues for GSH levels may be an important strategy for the prevention of oxidative stress-related diseases. We investigated if oral administration of liposomal GSH is effective at enhancing GSH levels in vivo.
Subjects/Methods: A one-month pilot clinical study of oral liposomal GSH administration at two doses (500 and 1000 mg of GSH per day) was conducted in healthy adults. GSH levels in whole blood, erythrocytes, plasma and peripheral blood mononuclear cells (PBMCs) were assessed in 12 subjects at the baseline and after 1, 2 and 4 weeks of GSH administration.
Results: GSH levels were elevated after one week with maximum increases of 40% in whole blood, 25% in erythrocytes, 28% in plasma and 100% in PBMCs occurring after two weeks (P<0.05). GSH increases were accompanied by reductions in oxidative stress biomarkers, including decreases of 35% in plasma 8-isoprostane and 20% in oxidized:reduced GSH ratios (P<0.05). Enhancements in immune function markers were observed with liposomal GSH administration including natural killer (NK) cell cytotoxicity, which was elevated by up to 400% by two weeks (P<0.05), and lymphocyte proliferation, which was elevated by up to 60% after two weeks (P<0.05). Overall, there were no differences observed between dose groups, but statistical power was limited due to the small sample size in this study.
Conclusions: Collectively, these preliminary findings support the effectiveness of daily liposomal GSH administration at elevating stores of GSH and impacting the immune function and levels of oxidative stress.
Sinha R, et al. Oral supplementation with liposomal glutathione elevates body stores of glutathione and markers of immune function. European Journal of Clinical Nutrition. 30 August 2017.
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