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When serum B12 falls in the gray zone, methylmalonic acid testing is recommended to clarify whether a functional deficiency exists

This administration route bypasses common absorption barriers, allowing for direct utilization by the body

Adding to the complexity is the overwhelming market of weight loss aids, many of which lack scientific validation or come with a host of unwanted side effects

Various other research studies, like one done by the American Journal of Professional Nourishment in 2000, indicate that this number might be even greater, with up to 39 percent of the populace possibly enduring from a vitamin B12 deficiency