However, those with a deficiency may have difficulty noticing odor changes because low levels of B12 can cause olfactory dysfunction characterized by partial or complete loss of smell.
Other symptoms of B12 deficiency
B12 binds to protein in food and is released in the stomach with the help of hydrochloric acid and enzymes.
“From there, vitamin B12 is combined with a protein called intrinsic factor so it can be absorbed further down the small intestine,” explains Harvard Health.
A vitamin B12 deficiency can manifest itself in many ways, but fatigue, dizziness, and pale skin may be among the most obvious signs.
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