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It is possible that a deficiency of B12 could lead to disrupted sleep patterns

FIGURE 1 FIGURE 2 Glutathione is synthesized in the cytosol of all cells from their precursor amino acids: glutamic acid, cysteine and glycine by consecutive action of two enzymes: -glutamyl-cysteine (-GluCys) synthetase (also known as glutamate cysteine ligase, GCL) that in a first step uses glutamate and cysteine as a substrate to form the dipeptide -glutamyl-cysteine

Thus, the greater understanding of the molecular regulatory network involved in the regulation of Zn deficiency response and Zn homeostasis would contribute to Zn phyto-availability by developing crops with an increased content of bioavailable Zn in plants, which has been considered as most cost-effective methods for combating Zn deficiency in plants and malnutrition problem in humans

Your best insurance to protect yourself against such cases is to only accept injecting pure B12, mixed only with pure, preservative-free, sterile saline