The B12 Society Logo
The B12 SocietyB12 • Be aware • Be well
The B12 Society logo

The B12 Society

Supporting Lives Affected by B12 Deficiency

UK charity raising awareness, supporting people affected by B12 deficiency, and improving diagnosis and treatment through training and research.

Check Your SymptomsExplore Patient Resources
85,000+
Community Members
120+
Symptoms Listed
UK Charity
Awareness, Support, Training, Research

A Small Charity With A Big Community

The B12 Society is small and depends heavily on donations.

We are a small charity, and donations help us keep providing patient support, education, advocacy, and awareness work for people affected by B12 deficiency.

Donate Now
Understanding B12 Deficiency

Understanding B12 Deficiency

Get the information you need to recognise symptoms and seek proper treatment for B12 deficiency and pernicious anaemia.

Join Our Community

Join Our Community

Connect with thousands of others affected by B12 deficiency. Share experiences, find support, and get the help you need.

Signs & Symptoms

Signs & Symptoms

Explore 120+ listed symptoms and practical guidance to support safer conversations with your GP.

How We Can Help You

From recognising symptoms to finding treatment, we provide comprehensive support throughout your B12 deficiency journey.

Check Your Symptoms

Evidence-based assessment

Use our symptom assessment tool to understand your symptoms and get guidance on next steps with your GP.

Browse Symptom Library

120+ symptoms listed

Explore 120+ listed symptoms across body systems and use the library to prepare for GP discussions.

Understand Causes & Risks

Cause-focused guidance

Learn key causes and risk factors, including pernicious anaemia, absorption issues, and medication effects.

Avoid Common Misdiagnoses

Practical next steps

See conditions often confused with B12 deficiency and practical steps for safer diagnostic conversations.

B12 Deficiency Assessment

This assessment tool helps you organise potential B12 deficiency symptoms and prepare for a GP discussion. It is informational and not diagnostic.

Neurological

Common neurological symptoms

Tingling in hands or feet
Memory problems
Difficulty concentrating

Psychological

Common psychological symptoms

Depression or low mood
Anxiety
Irritability

Physical

Common physical symptoms

Extreme fatigue
Shortness of breath
Pale skin

Digestive

Common digestive symptoms

Loss of appetite
Weight loss
Sore tongue

Get guidance you can take to your GP