N-acetyl-cystein: increases and stabilizes intracellular glutathione
Milk/Whey/Egg Protein: increases and stabilizes intracellular glutathione
Magnesium Sulfate (Epsom Salt): sulfate increases intacellular glutathione
Serotonin (5HT)- stimulates and stabilizes antioxidative enzymes.
Meletonin: stimulates and stabilizes antioxidative enzymes. Increases glutathione.
Zinc Aspartate: stabilized zinc-thiol complexes.
Desferoxamine: induces intacellular hypoxia and decreases reactive oxygen radicals and oxidative stress
Resveratrol (red grapes): antioxidant free-radical scavenger.
Amifostine: used to proect against platinum chemotherapy agents.
Aloe: heals but does not prevent radiation dermatitis, prevents apoptosis, decreases insulin resistance, antioxidant free-radical scavenger
B6/B9/B12 (Pyridoxine/Folate/Cobalamin): Required for the production of cysteine and methionine required for glutathione synthesis.
Vitamin C: keeps glutathione in reduced and active form.
Iodine (Provodone): paint on skin and body absorbs iodine which is taken up by the thyroid protecting the thyroid from radioactive iodine.
Best, cheapest, and easiest ones to store are: Vit B6/B9/B12/C, Iodine, Meletonin (need only mcg), Epsom Salt (MgSO4), Powdered Milk, and maybe Desferoxamine if you can get it.