glutathione and egg yolks Yolk Peptides Up-regulate Synthesis Antioxidant Enzyme Activities in a Porcine Model of Intestinal Oxidative Stress Pure Egyptian Whitening Egg Yolk
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Biol Chem 384:50516 Lu GD, Shen HM, Chung MC, Ong CN (2007) Critical role of oxidative stress and sustained JNK activation in aloe-emodin-mediated apoptotic cell death in human hepatoma cells

immune system problems : Immune system problems are disorders that occur as a result of the immune system not performing its normal functions
Removal from the restricted list is not the same as approval
Theres lots of reasons why, but ultimately this is an out-of-pocket procedure

Poole M, Bowtell R
Levels of B12 can dip too low for various reasons, though diet is a big one