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Expert care for a wide range of skin conditions, ensuring healthy, radiant skin.

Lesions & Bumps

Comprehensive care for skin lesions and bumps, promoting clear and healthy skin.

Lifting & Tightening

Advanced treatments to lift and lighten the skin, enhancing firmness and brightness.

Rejuvenation

Revitalize your skin with advanced treatments designed to restore a youthful glow.

Skin Treatments

Effective solutions for a variety of skin concerns, promoting clear and healthy skin.

Wellness

Holistic skincare approaches to support overall skin health and well-being.

Advanced, non-invasive treatments to rejuvenate your appearance without surgery.

Body Treatments

Transformative, non-invasive treatments to sculpt and tone your body effortlessly.

Facial Treatments

Rejuvenating facial treatments to refresh and enhance your natural radiance.

Hair Treatments

Advanced treatments to restore hair vitality and promote healthy growth.

Injectables

Minimally invasive injectables to smooth wrinkles and enhance facial contours.

Precision cosmetic surgery tailored to enhance and refine your natural beauty.

Body Surgery

Expertly performed body surgeries to reshape, contour, and enhance your physique.

Breast Surgery

Specialized breast surgeries to enhance shape, size, and symmetry for a natural look.

Cosmetic Andrology

Advanced procedures designed to enhance male aesthetics and address intimate concerns.

Cosmetic Gynaecology

Tailored surgical solutions to enhance feminine aesthetics and improve intimate well-being.

Facial Surgery

Precision facial surgeries to refine features and achieve natural, balanced results.

Fat Transfer/Removal

Advanced fat transfer and removal techniques to sculpt and enhance your body’s contours.

Comprehensive solutions to address a range of body concerns, from stubborn fat to skin laxity.

Breasts

Tailored solutions for breast concerns, including size, shape, and symmetry.

Other Areas

Targeted solutions for stubborn areas of the body, tailored to your unique needs.

Volume & Contouring

Specialized treatments to enhance body volume and improve overall contour for a balanced silhouette.

Holistic care focused on improving overall health and well-being for a balanced lifestyle.

Digestive Health

Comprehensive care to support digestive health and improve overall well-being.

Energy & Immunity

Holistic approaches to boost energy levels and strengthen your immune system for optimal health.

General Health

Personalized strategies to maintain and enhance your overall health and vitality.

Expert care for a wide variety of skin and facial concerns, promoting a healthy, glowing complexion.

Ageing Signs

Expert treatments to minimize ageing signs, rejuvenating your skin for a youthful glow.

Skin Texture & Tone

Advanced treatments to improve skin texture and even out tone for a smoother, radiant complexion.

Specific Areas

Targeted treatments to address skin concerns in specific facial areas for balanced, refined results.

Volume & Contouring

Tailored solutions to restore facial volume and enhance natural contours for a more youthful appearance.

When a friend uses your referral code, they'll get £50 off their first treatment, and you'll get £50 off your next one.

The more friends you invite, the more you earn.

Vitamin B12 deficiency symptoms and causes

Doctor-led diagnosis and treatment for vitamin B12 deficiency

★★★★★

20 Years of Safety: Trust in our 20 year track record and history of excellence

Award Winning Clinic: Over the last two decades we've received multiple awards

What is vitamin B12 deficiency?

Vitamin B12 is a key vitamin that helps ensure that your body’s nerves and blood cells remain healthy. It also aids in the making of DNA, the genetic material found in all your cells. B12 which is usually found in meat and fish, eggs and dairy products. Many plant-based milks and some cereals are also fortified with B12.

Vitamin B12 deficiency occurs when you do not consume enough of this vitamin, either due to an inadequate dietary intake of B12-rich foods or issues with your body absorbing it. Low B12 together folate deficiency may result in feeling extremely fatigued, weak or lightheaded. Other people have numbness, memory problems or mood changes. Long-term B12 deficiency can lead to serious problems with your nerves and even your brain. In some instances, it can appear as folate deficiency anaemia, a condition that also impacts your healthy red blood cells. In the long run, insufficient B12 can lead to serious problems with your nervous system, and possibly affect your nerves, brain and spinal cord.

This can manifest as feeling tired, weak or nauseous. Your appetite may diminish, your weight may drop, or you might develop a sore mouth or tongue. Some also see their skin looking slightly yellow.

Symptoms that can present as tingling or numbness in your hands and feet, blurry vision or difficulty walking and speaking clearly. You may also tend to feel more forgetful or confused than normal.

Neurological and psychological symptoms may include feeling down, moody or easily annoyed. You might also find that your mood or behaviour seems to change for no apparent reason.

Be worried if a deficiency in Vitamin B12 was diagnosed. If some of the symptoms occur for example, if you are tired all the time, have neurologic symptoms or notice strange feelings or tingling in your hands or feet, schedule a consultation with your doctor to perform a physical exam and request for blood tests. Because this does not mean that everything is in order. In the absence of treatment, a Vitamin B12 deficiency can become worse. A complete blood count will help determine if you need to take supplements or injections, so there is no need to worry too much.

B12 injections are more quickly absorbed than pills, bringing B12 directly into muscle.

Some common causes include:

Megaloblastic anemia for having fewer red blood cells which can leave you feeling tired, weak, and short of breath.

Nerve damage like tingling, numbness or burning in your hands and feet.

B12 might adversely affect your brain, leading to confusion, forgetfulness or even early dementia.

A lack of the vitamin has been associated with depression, irritability and behavioral changes.

Some may have difficulty walking or maintaining balance.

B12 deficiency can also injure the optic nerve, causing blurred or distorted vision.

Possible pregnancy complications and birth defects.

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One of the best ways to avoid nutritional deficiencies is to get enough from the food you eat. Include meat, fish, eggs and milk, cheese and breakfast cereals with added B12.

Staying healthy

If you’re not eating B12-rich foods, your body may not receive everything it requires to remain healthy. That over time can make you feel very tired, weak or even confused.

Yes, dietary supplements, a great option to resolve dietary insufficiency. They are easy to find and can help ensure that you get enough of this important vitamin.

Always check with your doctor

Those who don’t eat meat or dairy, and older people, may need B12 supplements. If in doubt, consult your health professionals.

Yes. Digestive issues such as Crohn’s disease or celiac disease can hinder your body’s ability to absorb B12. If you have these conditions and treat them, it can help keep your levels normal.

Early intervention

If these health issues aren’t treated, your body may not get the B12 that it requires. Getting help sooner can make a huge difference.

Yes, drinking heavily can damage the lining of your stomach, making it more difficult for people to absorb B12. Reducing allows your body to absorb vitamins better.

Limit your intake

It can lead to vitamin issues if you drink a lot or often. Try to avoid or talk to a doctor about what’s safe to do.

Yes. A basic blood test can tell whether your B12 is too low, even before symptoms hit.

Who should be screened regularly?

Older adults, those with stomach or gut problems or those on some types of medication should talk to their doctor about testing B12 regularly.

M Samuel

Amazing staff, helpful and a supportive team.

18th June 2026

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Dr Tee was great!

18th June 2026

Holly Pienaar

Amazing service with dr Glancey

18th June 2026

Melis Mackley

Love this clinic I practically live here

16th June 2026

Kasia Wojtas

Dr Omar has been very supportive and helpful.

15th June 2026

Trent Park

Great clinic thank you

15th June 2026

Tim F (Tim)

Excellent service. Dr Basu was fantastic.

12th June 2026

Catherine Cunningham

Very professional and efficient team

11th June 2026

Edward Harrison

Good efficient treatment. Very professional.

11th June 2026

Camilla Carere

Thank you Dr Khan!

10th June 2026

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Our award winning clinic

The Harley Street Skin Clinic is an award-winning boutique private cosmetic clinic in the heart of London. We offer the most advanced surgical and non surgical techniques in our fully-fitted consulting rooms, state-of-the-art operating theatres and purpose-built aesthetics and laser suite.

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