Vitamin B12 is essential for nerve function, red blood cell production, DNA synthesis, and energy metabolism. Yet studies suggest that up to 20% of adults over 50 may have insufficient B12 levels — often without realizing it.
The reason is biological: as we age, our stomachs produce less hydrochloric acid and a protein called intrinsic factor, both of which are necessary to absorb B12 from food. This means that even people with B12-rich diets can develop deficiency after 50.
Symptoms to Watch For
B12 deficiency develops gradually and the symptoms can be subtle at first. Watch for persistent fatigue and weakness that doesn't improve with rest, tingling or numbness in hands and feet, difficulty with balance or walking, brain fog, memory difficulties, or confusion, mood changes including depression or irritability, and pale or yellowish skin.
These symptoms overlap with many other conditions, which is why B12 deficiency is often missed or misattributed to 'just getting older.' If you experience several of these, ask your doctor for a B12 blood test.
Who Is Most at Risk?
Adults over 50 due to decreased stomach acid production. People taking acid-reducing medications like PPIs or H2 blockers. Those following vegetarian or vegan diets, since B12 is primarily found in animal products. People with digestive conditions affecting the small intestine. Those who have had gastric surgery.
How to Address B12 Deficiency
Dietary sources include meat, fish, eggs, and dairy — but absorption challenges mean food alone may not be sufficient after 50. The National Institutes of Health recommends that adults over 50 get most of their B12 from supplements or fortified foods, since the synthetic form doesn't require stomach acid for absorption.
VitaDaily from TriVita includes a complete B-vitamin complex as part of its 24 vitamins and minerals, providing foundational support in a convenient once-daily tablet. For those with significant deficiency, your doctor may recommend higher-dose B12 supplements or injections.
