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First isolated from human plasma by Loren Pickart in 1973, GHK is a naturally occurring molecule: plasma levels sit around 200 ng/mL in young adults and decline steadily with age
Liposomal encapsulation has real clinical support: a 2017 pilot trial in the European Journal of Clinical Nutrition found that liposomal glutathione at 500-1,000mg daily raised whole-blood GSH by 40%, PBMC glutathione by 100%, and NK cell cytotoxicity by up to 400% within two weeks faster and more pronounced changes than the reduced L-glutathione RCT showed (Sinha et al., 2017
Additionally, glutamine plays a key role in supporting the intestinal lining and protecting the gut from bacteria and pathogens (Castell et al., Nutrition )
Inhibition of GPX4 rehabilitates ferroptosis in polymorphic TC cells, which results from ROS accumulation and GSH depletion [238]
In addition, glutathione decreases naturally as you age
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