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Older individuals: Aging leads to decreased gastric acid production, reducing B-12 release from bound proteins
Beef liver is the highest in B12
How Is a Vitamin B12 IV Drip Better Than Oral Supplements
Timeline of side effects: what to expect week by week Knowing when side effects typically appear and resolve helps researchers prepare mentally and practically
These include hormonal, neurotransmitting, and immunomodulatory functions [2]
