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Yes - It is not recommended to microneedle the skin more often than once a month
A study found, Parenteral vitamin B12 is more effective than oral supplementation in patients with severe deficiency or malabsorption. In summary, B12 injections are essential for treating many health conditions and absorption problems
PMC 135491
Certain groupsincluding vegetarians, older adults, and those with medical conditions affecting absorptionare at greater risk for deficiency
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