Her story isn’t rare. Studies show that after age 50, stomach acid production often declines, making it harder to absorb B12 from food. Long-term use of certain acid-reducing medications or metformin can worsen the problem.
The good news? Boosting B12 intake can often help restore energy and clarity. But first, you need to recognize the signals your body is sending.
Best Sources of Vitamin B12 for Everyday Absorption
Not all B12 sources are equal. Here’s a quick comparison to help you choose wisely:
Source Type Examples Absorption Potential Best For Daily Idea
Animal Foods Salmon, eggs, beef, clams High Natural intake 3–4 oz serving
Dairy Yogurt, milk, cheese Good Easy addition 1 cup yogurt or milk
Fortified Foods Cereals, plant milks Moderate Vegans/vegetarians Breakfast portion
Supplements Tablets, sublingual, shots Varies by form Confirmed deficiency As recommended by doctor
Animal sources remain the most bioavailable, but fortified options and supplements can be lifesavers for those who need them.
8 Unusual Signs Research Links to Low Vitamin B12
Your body has unique ways of waving red flags. Here are eight lesser-known signals, backed by scientific observations:
Blurred or Disturbed Vision
Some people notice sudden fuzzy spots or shadows in their sight. Studies suggest B12 deficiency can affect the optic nerve, though this is rare.
Unexpected Mood Swings or Irritability
Feeling unusually snappy or blue without clear reason? Research links low B12 to changes in brain chemicals that influence mood.
