is glutathione bleaching for skin lightening: a regnant myth or evidence-based verity? A New Skin Lightening Procedure
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It plays a crucial role in metabolic processes like the Krebs cycle and oxidative phosphorylation

Merci pour la question!

Although they may contain varying levels of B12 plant sources are not considered a reliable source of B12

And I've looked at some things online that have said, and you actually alluded to this, that because they're amino acid sequences, if you take them orally, they'll be broken down as if it was food

People with pernicious anemia may need monthly injections for life
