Can Vitamin B12 Deficiency Cause Anxiety & Fatigue?
By Mr Tharb Faisl
If you’re feeling anxious, tired, forgetful or foggy – but your GP says everything looks fine – you could be low in vitamin B12. This essential nutrient supports your nervous system, brain health, and energy production. Without enough, your body and mind can feel out of sync.
At Marylebone Diagnostic Centre in Baker Street, many of our patients come in with months (or years) of unexplained symptoms – only to find that B12 deficiency was the root cause all along.
Book Your Vitamins Tests Today!
Symptoms You Shouldn’t Ignore
Vitamin B12 deficiency can mimic anxiety, burnout, or even depression. Common signs include:
- Feeling tired or drained all the time
- Brain fog, forgetfulness, or low concentration
- Mood swings or low mood
- Pins and needles or tingling in hands/feet
- Pale skin or mouth ulcers
- Dizziness or light-headedness
- Breathlessness on exertion
“I thought I had anxiety or was just burnt out. My B12 was extremely low. After treatment, I felt like myself again.” – Emma, Central London
People at higher risk of deficiency include:
- Vegetarians and vegans
- People over 50
- Those with gut issues (IBS, coeliac, Crohn’s)
- Long-term antacid users
- Women with heavy periods
What We Offer at Marylebone Diagnostic Centre
We offer a full Vitamin B12 & Anaemia Profile, including:
- Vitamin B12
- Folate (B9)
- Ferritin (iron stores)
- Haemoglobin (FBC)
- eGFR (kidney function)
- Lipid Profile
- Thyroid Function (as symptoms often overlap)
This test is ideal for:
- Chronic fatigue
- Anxiety or brain fog
- Suspected anaemia
- People switching to plant-based diets
Treatment Options Available
If your levels are low:
- Vitamin B12 injections (hydroxocobalamin) on-site at our clinic
You’ll leave with a plan – not just numbers.
Convenient Central London Location
Marylebone Diagnostic Centre is located at: 📍 73 Baker Street, London, W1U 6RD
Easily accessible from Harley Street, Kings Cross, Paddington, Euston, and Mayfair
Same-day appointments. Walk-ins welcome.
Price
Vitamins Screening
Includes analysis, and optional treatment review.
FAQs
Book Your Vitamin B12 Test Today
Don’t keep wondering – find out if low B12 is behind your symptoms.
📞 Call/WhatsApp: +44 7495 970109
🔗 www.marylebonediagnosticcentre.com
📍 Visit us: 73 Baker Street, London, W1U 6RD