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does glutathione decrease estrogen Participation in the Prevention of Cardiovascular Diseases Glutathione IV: A Natural Solution
Description
should help you decide which option deserves a clinical review, not force a one-size answer

did note a significant decrease in levels of GSH, GPx activity, and GST-M [22,23]

Pure Bulk sells its NAC powder in the following sizes: Note: It may look as though the 1g and 1.5kg amounts cost the same per dose, but this is a reality of rounding

Since a 10mg vial provides multiple doses over several weeks, you need bacteriostatic water with its benzyl alcohol preservative to prevent bacterial contamination between draws
