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Janaki S

Introduction The liver has a central role in metabolism, because of both its anatomic placement and its many biochemical functions The liver receives venous blood from the intestine: thus all of the products of digestion, ingested drugs and other xenobiotics reach it and may be further metabolized before entering the systemic circulation

It is also used in other vitamin B12 deficiency conditions caused by poor absorption, strict vegetarian diet, certain stomach or intestinal disorders, or after stomach surgery

Sometimes people can take high doses of oral B 12 to provide replacement instead of undergoing injections, but a physician should closely supervise this

for a small volume like this, a 30- or 50-unit insulin syringe improves readability

Some interfere with nutrient absorption, others enhance nutrient excretion and still others impede the body's ability to synthesize nutrients or convert them to useable forms