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Speichinger explains

For oral health and general health, studies have demonstrated that adequate vitamin D levels must be maintained ( Fig

B12 injections are especially useful for people with a B12 deficiency, which tends to stem from difficulties absorbing the nutrient, not falling short nutritionally, says Foxx

Choose your concentration based on your comfort level with syringe precision and your tolerance for injection volume

3 Skin care The injection site should be kept clean and dry afterwards to prevent infection

Possible Side Effects and When to Seek Care Vitamin B12 injections are generally well tolerated, but like any medical treatment, they can have side effects