Pins and Needles, Memory Lapses or Mood Changes: Could Low B12 Be Responsible?

Are unexplained pins and needles, forgetfulness, or low mood affecting your life?

Many people across the UK experience nerve symptoms or cognitive changes that are dismissed as stress or ageing. But could vitamin B12 deficiency be the underlying issue?

What is vitamin B12’s role in nervous system health?

Vitamin B12 is vital for nerve function and brain health. It helps build the myelin sheath—a protective coating around nerves—essential for fast, accurate signal transmission. When B12 is lacking, nerve damage can develop, sometimes becoming irreversible if left untreated.

Symptoms linked to low B12 and nerve function:

• Numbness or tingling (pins and needles) in hands, feet, or legs
• Muscle weakness or imbalanced walking
• Memory problems and cognitive changes
• Mood swings, depression, or anxiety

Why does this happen?

Insufficient B12 starves your nerves of what they need to repair and function well. Over time, this can lead to permanent nerve damage, especially in older adults or those with gastrointestinal conditions that affect absorption. Learn more at NHS A-Z: Vitamin B12 or folate deficiency anaemia.

How can you find out if low B12 is the cause?

The only way to know for sure is with a blood test. Mayfield Clinic's Active Vitamin B12 Home Blood Test Kit allows you to collect a finger-prick blood sample at home, ensuring privacy and convenience. Results are available in just one day, so you can address the issue quickly.

Don't ignore the warning signs:

• If you have persistent tingling, cognitive changes, or mood issues, act sooner rather than later.
• Even mild symptoms deserve investigation, especially if you eat little animal-derived food or have known absorption issues.
• Regular blood tests, a balanced diet, and prompt GP consultation help keep your nervous system healthy.

Your next steps? Buy a home testing kit or book an in-clinic blood test at Mayfield Clinic.

Take charge of your neurological wellbeing

Don’t leave your health to chance. With knowledge, testing, and support, you can protect your nerves and your mind from the silent impacts of B12 deficiency.