Stress, not-so-great food choices, and being around environmental nasties can lower our glutathione levels
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Studies show that supplemental melatonin changes the composition of the gut microbiome, reduces weight, decreases fatty liver, and decreases low-grade inflammation.[ref] Another animal study showed that melatonin not only changes the gut microbiome but also improves the intestinal barrier and increases gastrointestinal motility.[ref] Viral and parasitic infections: Cardiomyopathy, caused by a viral infection (Coxsackievirus B3), is prevented by supplemental melatonin.[ref] Quite a few parasitic infections show improvement with melatonin including malaria, toxoplasmosis, and trypanosomiasis.[ref] Pretreatment with melatonin decreases the damage to the lungs in RSV infection.[ref] Melatonin may even help with the Ebola virus.[ref] Migraines: A randomized placebo-controlled trial showed that melatonin (3mg/night) for 12 weeks was superior to placebo for migraine prevention

HFD and MCDD feeding experiment Fifteen 4-week-old healthy male GSTM2 knockout mice and 15 wild-type mice were selected for high-fat diet (HFD) feeding
Allergic reactions are rare but possible with any medical treatment
Therefore, researchers across the world felt the need to understand how antioxidant enzymes, including seleno-GPxs, being the primary ROS detoxification machinery, modulate cellular radiosensitivity