Vitamin B12 Deficiency: Fatigue, Tingling and Testing

Vitamin B12 supports red blood cell production and nerve health. Deficiency may cause tiredness, pallor, tongue changes, poor concentration and tingling in hands or feet.

Symptoms, causes and key details

Low intake, absorption disorders, stomach surgery and some medicines can increase risk. A blood count, B12 level and sometimes additional tests are interpreted together.

Assessment and practical next steps

Tell your clinician about diet, stomach conditions, medications and how symptoms developed. Treatment may be oral or by injection, depending on cause.

When is urgent help needed?

Difficulty walking, progressive weakness or significant new neurological symptoms warrant prompt assessment because nerve injury can persist.

Frequently asked question

Can B12 deficiency occur without anaemia?

Yes, neurological symptoms may precede blood count changes.

This article provides general information, not a personal diagnosis or treatment.

Trusted information source: https://ods.od.nih.gov/factsheets/VitaminB12-HealthProfessional/