Changes in Mobility
If untreated, the damage to your nervous system caused by a B12 deficiency could cause changes to the way you walk and move.
It may even affect your balance and coordination, making you more prone to falling.
This symptom is often seen in undiagnosed B12 deficiency in the elderly, as people over the age of 60 are more prone to a B12 deficiency. However, preventing or treating deficiencies in this group may improve mobility.