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Glutathione can also be taken by inhalation, through nasal sprays, especially for the treatment of lung diseases including cystic fibrosis

PMID: 6832711, DOI: 10.1002/hep.1840030213

It inhibits melanin synthesis by means of stopping the neurotransmitter precursor L-DOPAs ability to interact with tyrosinase in the process of melanin production

However, a meta-analysis reported that the use of NAC showed no significant improvement in pregnancy rate, serum LH level, fasting insulin, and LH/follicle-stimulating hormone (FSH) ratio despite that the BMI and total testosterone were significantly reduced (138)

doi: 10.2147/IJN.S245326