Clin Pharmacokinet 54:359370 Myren M, Mose T, Mathiesen L, Knudsen LE (2007) The human placenta-an alternative for studying foetal exposure
Theyre produced naturally when your body burns oxygen for energy (in your mitochondria), but also from: Pollution and cigarette smoke Alcohol and processed food UV light and stress In small amounts, free radicals are fine - theyre actually part of your immune defence
Repeated stress can serve as a rodent model of posttraumatic stress disorder, which induces increases in circulating ghrelin (72)
hence, models related to the increase of pro-oxidants have been explored
Tan S, Schubert D, Maher P
Neurosci Lett 569:7479 Liberati A, Altman DG, Tetzlaff J et al (2009) The PRISMA statement for reporting systematic reviews and meta-analyses of studies that evaluate health care interventions: explanation and elaboration