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A quick caveat: Here's something I should point out about the clinical research on B12 and sleep: a great deal of it is based on, or refers to, a previous study or research studies that are 20 or nearly 30 years old now

In the 50s, when chemotherapy wasnt yet available, massive doses of B12 shots were given to children with a neuroblastoma tumor every two days, for 2-3 years with great success: NEUROBLASTOMA: AN EVALUATION OF ITS NATURAL HISTORY AND EFFECTS OF THERAPY, WITH PARTICULAR REFERENCE TO TREATMENT BY MASSIVE DOSES OF VITAMIN B12

M.BhrM

GLUTATHIONE TABLETS can be considered as food/dietary supplements

Age-related decline of glutathione content in human blood