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Other symptoms of B12 deficiency include numbness in your hands and feet, sore mouth or tongue ulcers, vision problems, and loss of appetite or weight loss

Regulations can change

Treatment consists of intramuscular injections of cyanocobalamin, hydroxocobalamin, or mecobalamin at a dose of 1,000 g daily for one week, followed by weekly injections for one month, and then monthly maintenance therapy [3]

you'll end up depositing the peptide in the fat layer, failing your protocol's objective

The committee recommends that EPA add a section or paragraph to its Reassessment on the immunotoxicology of TCDD, other dioxins, and DLCs in the context of the biological mechanisms responsible for health effects relevant to assessing the likelihood of such effects occurring in humans at relatively low levels of exposure

So frustrating