B12 deficiency symptoms: The warning sign that may be apparent when walking up the stairs


Individuals who are unable to absorb the nutrient naturally may need to receive injections at regular intervals to top up their levels.

Where to find B12Harvard T.H Chan School of Public health says: “Vitamin B12 […] is naturally found in animal foods.”

Food sources of B12 include fish, shellfish, liver, red meat, eggs, poultry, milk cheese, yoghurt, and fortified nutritional yeast.

Individuals who exclude these foods from their diet may be encouraged to use supplementation with B12.


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