The Need for New Formulations Because of these quite dramatic and potentially efficacious effects, and the urgency of the COVID19 pandemic, in addition to simply repurposing the original oral tablets, there have been efforts to develop new formulations and routes of administration for niclosamide, to validate them in preclinical studies, and clinically test niclosamide for COVID-19 (see this reference to clincaltrials.gov (35))
Focus on: Cruciferous vegetables: Broccoli, Brussels sprouts, cauliflower, and kale
10.3177/jnsv.61.182 35 YotoA.MuraoS.MotokiM.YokoyamaY.HorieN.TakeshimaK.et al (2012)
PubMed: 24791752Clinical (RCT / meta-analysis) ref-2.Kumar P, Liu C, Suliburk J, Hsu JW, Muthupillai R, Jahoor F, Minard CG, Taffet GE, Sekhar RV Supplementing Glycine and N-Acetylcysteine (GlyNAC) in Older Adults Improves Glutathione Deficiency, Oxidative Stress, Mitochondrial Dysfunction, Inflammation, Physical Function, and Aging Hallmarks: A Randomized Clinical Trial
Either they don't have enough or they have barely have enough to be in the normal range, but nothing extraordinary
