A reduction in GSH level wasalso detected in patients diagnosed with mild cognitive impairment (MCI) or Alzheimer'sdisease (Jomova et al., 2010;Mandal et al., 2012).Together with our findings on the increased GSH content in brain tissue we speculatethat the regulation of GCLC gene expression caused by FV juice intervention plays animportant role in protecting brain tissue from oxidative damage. The gene discussed is GCLC; the disease is Cognitive impairment.