Signs of deficiency include:
• extreme tiredness
• feeling faint
• lack of energy
• pins and needles
• muscle weakness
• depression and cognitive problems
Anaemia can occur when a lack of B12 or folate affects our body’s ability to produce enough red blood cells.
A lack of B12 can also lead to a raised blood levels of an amino acid called homocysteine which, at high levels, is linked to heart disease.