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It's injecting air into the vial while drawing the bacteriostatic water

PMID: 29358856

To determine reference ranges, labs test the blood of a large representative population sample (chosen based on characteristics like age, sex, and general health status) and use statistical analysis to identify the middle 95 percent of values for the nutrient in question

Certain health conditions such as intestinal or stomach problems, poor nutrition, cancer, HIV, pregnancy, old age, veganism and alcoholism can cause vitamin B12 deficiency

Yes, but expect minimal symptom relief

Lipotropic Injection: Vitamin B12 (Methylcobalamin) is essential for helping to form healthy cells in the body