This happens because the breakdown releases a pigment called bilirubin, which can alter skin tone.
5. Shortness of Breath and Dizziness
Because B12 deficiency reduces healthy red blood cells, oxygen delivery to tissues becomes less efficient. This may cause dizziness, lightheadedness, or shortness of breath during normal activities such as climbing stairs or walking.
6. Mood Changes or Depression
Low vitamin B12 levels may also affect mental health. Some studies suggest that B12 plays a role in producing brain chemicals that regulate mood. People with low levels sometimes report irritability,
