A small RCT (n=21) found that inhaled glutathione (600 mg twice daily for 3 months) modestly improved some pulmonary function parameters (Griese et al., Am J Respir Crit Care Med, 2004) [47]
FeSO 4 was effective at high (FeSO 4 -H) and medium (FeSO 4 -M) dosages, whereas the efficacy of FeSO 4 -L was considerably lower than that of the aforementioned groups
Nonetheless, evidence-based interventions at local, state, and federal levelssuch as increasing tobacco prices, implementing public health campaigns, restricting targeted marketing, providing subsidized smoking cessation counseling through insurance, offering FDA-approved medications, and enforcing smoke-free lawsare essential to sustaining the downward trend of tobacco use (see Flavored Tobacco Products )
Its not dramatic, but its directional