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One small placebo-controlled, double-blind, crossover trial looking to measure the impact of glutathione on sperm had patients administer 600mg of glutathione intramuscularly every other day for two months

Vigorous mixing or agitation can damage peptide structures

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Cell and tissue research, 377 (2), 153159

To help preserve structural integrity, add the chosen solvent slowly against the inside wall of the vial rather than directly onto the peptide cake, and avoid vigorous shaking