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Subcutaneous sites include the abdomen and outer upper arms
Insufficient intrinsic factor production, common in older adults due to age-related absorption decline, can also lead to deficiency
Good stuff it finally got me over a month long cold
5 Conclusion This systematic review and meta-analysis indicate that sublingual and oral vitamin B12 administration provide efficacy comparable to intramuscular injection in improving serum cobalamin levels and reducing hyperhomocysteinaemia
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