Mitochondrial Redox Breakdown Most people assume nighttime symptoms are caused by “die-off” or paras/tes becoming more active…But one of the most overlooked, science-supported explanations has nothing to do with die-off at all. Your mitochondria undergo a major metabolic shift when darkness hits  — and if they’re already stressed by mold toxins, heavy metals, or chronic infection, that shift becomes unstable. That instability = redox stress . And redox stress = nighttime symp