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Dell'Osso L, Carmassi C, Mucci F, Marazziti D
"The effect of B-vitamins on biochemical bone turnover markers and bone mineral density in osteoporotic patients: a 1-year double blind placebo controlled trial"
Its an invasive procedure that requires breaking the skin, which may be uncomfortable for some individuals
Thats important for increasing B12 levels in people who cant properly absorb B12 from food or supplements
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