1. Akkasheh G, Kashani-Poor Z, Tajabadi-Ebrahimi M et al (2016) Clinical and metabolic response to probiotic administration in patients with major depressive disorder: a randomized, double-blind, placebo-controlled trial. Appl Nutr Invest 32(3):315–320
2. Arck P, Handjiski B, Hagen E et al (2010) Is there a gut-brain-skin axis’? Exp Dermatol 19:401–405
3. Azad MAK, Sarker M, Wan D (2018) Immunomodulatory effects of probiotics on cytokine profiles. Biomed Res Int 2018:8063647
4. Aziz N, Bonavida B (2016) Activation of natural killer cells by probiotics. For Immunopathol Dis Therap 7(1–2):41–55
5. Bindurani S (2019) Review: probiotics in dermatology. J Skin Sex Transm Dis 1(2):66–71