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Description
Frier Levitt
SUMMARY There are four forms of vitamin B12 supplements, three of which are chemically identical to vitamin B12 found in foods
Two brand names exist for the same molecule
Adequate and well-controlled studies have not been done in pregnant women
If premature greying or unexplained hair shedding is a concern, a GP-ordered blood test covering B12 alongside ferritin, vitamin D, and thyroid function is the most useful starting point
