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Why B12 Matters: Vitamin B12 is essential for: Red blood cell production DNA synthesis Nerve function Mental clarity Energy metabolism Its especially critical for vegetarians, vegans, older adults, or those with conditions like pernicious anemia or digestive malabsorption issues (e.g., celiac, Crohns, or low stomach acid)
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(trusted non-journal) Mayo Clinic Staff
Also, they regained the dermal, muscle, tendon, and ligament functions (Mikus et al., 2001
