IV Vitamin Therapy

Vitamin B12 Shot + B Cocktail

Vitamin B12 Shot + B Cocktail
We provide vitamin B12 shots + B cocktail shots from our health optimisation clinic in London.

B vitamins are vital nutrients that play important roles in the body, ensuring the cells are functioning properly and helping maintain the organs and bodily systems. B12 specifically, is essential for energy formation, DNA synthesis, creation of red blood cells and nerve health.

Get in touch to find out more

Vitamin shots deliver more vitamins + nutrients than oral vitamins

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So, is a B12 shot or B cocktail (B1, B2, B3, B5, B6, B7, B12) right for you? The vast majority of patients we see for B12 shots or B cocktails are those who are tired all the time and generally feel weak and run down. Is this you? You may be showing other signs of a vitamin B12 deficiency including:

  • Depression or feeling low

  • Sleep issues

  • Fatigue

  • Brain fog

  • Muscle weakness

  • Anaemia

  • Infertility

  • Recurrent miscarriages

  • Low sperm count

“Vitamin B12 can really make a difference if you’re feeling low on energy, have a chronic illness or absorption issues. B cocktail really is a superboost! It’s great value for money + you get all the benefits of B12 plus all the other B vitamins too – it’s a win-win!”

Dr Harpal Bains

Dr. Harpal Bains

Learn more about vitamin B12 deficiency

What’s the difference between a B12 shot + B cocktail?

Both B12 and B cocktails are injections that are quick to administer and are great for helping to replace what your body can’t make.

B12 shot: 1mg vitamin B12

B cocktail: 1mg B12 + 1ml B complex (B1, B2, B3, B5, B6, B7, B12)

If you’re not sure which is best for you, all our vitamin therapies come with a free consultation with our IV clinician. They can advise you on what is most suitable, based on your goals or any symptoms you may have.

What are the benefits of vitamin B12?

  • Ensures the body’s cells are working properly

  • Helps convert food into energy

  • Aids in creation of new red blood cells

  • Essential for healthy body tissues

  • Aids with proper functioning and development of the brain

  • Supports skin cell health

“A vitamin shot bypasses the gut, delivering 100% of the vitamins into the body, + can be very effective if you have issues with absorption."

Dr Harpal Bains

Dr. Harpal Bains

What causes vitamin B12 deficiency?

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For most people, it is thought that eating a healthy diet is sufficient to get enough vitamin B12. But if your diet isn’t optimal, or if your body has an underlying issue, it may not absorb enough B12 – which can lead to health problems. What can cause a vitamin B12 deficiency? Some of the more common underlying issues we see in the clinic include:

  • Pernicious anaemia. This is an autoimmune disorder caused by a lack of red blood cells when the body is not able to absorb enough vitamin B12.

  • A vegetarian or vegan diet. B12 is most abundantly found in animal products. It is often the case that those with vegetarian or vegan diets are deficient in B12 and absorption can be erratic.

  • Low stomach acidity. This is an increasingly common problem, especially for those who take antacids to counter perceived high stomach acidity. Normal acid levels are required for optimal B12 absorption.

  • Gut issues. Many people have ‘subclinical’ gut issues. If you have a lot of gas, acid reflux, belching, loose motion and/or constipation, brain fog, migraines and/or joint pains, you probably have a gut issue like SIBO, leaky gut or irritable bowel syndrome (IBS). These issues can cause havoc with the absorption of nutrients and many people don’t realise that they have gut issues as symptoms can appear very gradually.

  • Stomach disorders. People with conditions like celiac disease or Crohn’s disease may not be able to absorb enough B12 from food.

Are you vegan or vegetarian?

Most people get all the B12 they require through the food they eat (think meat, poultry, fish, and dairy), but if you’re a vegan or vegetarian, you’re at risk of a deficiency. Vitamin B12 is made by bacteria and is mostly found in animal products and a few selected fortified products. It’s presence in plant based products have decreased over the years due to high levels of hygiene in agricultural practices which kills off these bacteria that make the B12.

Tip: Vegan sources of B12 include nutritional yeast (Marmite), algae, seaweed, certain mushrooms and fortified foods.

Read more: How to go vegan properly. Are B12 shots the answer?

The Harpal way

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At Harpal Clinic we offer B12 Hydroxocobalamin. We take a lot of trouble sourcing our vitamin nutrients and we have found this form has shown the most benefit for a majority of our patients. Our clinic can also perform blood testing to determine your vitamin B12 and other nutrient levels. We will advise you during the consultation.

“Although we’re happy to deliver B12 shots as a one-off, for patients with underlying illnesses we do prefer to work with you long term to help get your health in a better place. Our approach involves improving your baseline health, so the cells in the body are working properly and the body is able to absorb oral nutrients better. We tend to find that patients who are very deficient notice a bigger difference in how they feel right after the shot. As you get better/less deficient, you generally will feel less of a difference but – don’t be fooled – that doesn’t mean the nutrients are not working extremely hard and fulfilling important jobs inside the body,” explains Dr Harpal Bains.


Includes a complimentary consultation with our IV Clinician.

B12 (Hydroxocobalamin)


B12 – course of 6

(Save £15)


B Cocktail (Complex + B12)


B Cocktail - course of 6

(save £30)


  • We take the full cost of the service at the time of booking to secure the appointment.
  • We do have nutrient blood testing facilities available and will advise you about this during your consultation.
Aaliyah, Harpal Clinic

Let’s talk about how we can help you