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Intranasal delivery represents the most significant methodological advancement because it bypasses hepatic first-pass metabolism entirely, but technique sensitivity (nasal cavity anatomy, administration volume, head positioning post-dose) introduces reproducibility challenges that subcutaneous injection avoids

Oral glutathione shows comparable GSH-raising effects in longer-duration studies (3-6 months) and liposomal formulations, but short-term results in healthy adults are less consistent

The alpha polymorph readily laminates, and forms very fragile tablets

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The outcomes were sperm motility, sperm concentration, sperm morphology, and pregnancy rate