Vitamin Injections and IV Drips in London 2026. What Has Evidence, What Does Not and What to Do Instead

Few treatments in London are marketed as hard as the IV vitamin drip and few are supported as thinly. The pitch is that intravenous delivery bypasses the gut and drives blood levels higher, which is accurate and largely irrelevant, because with water-soluble vitamins the kidneys clear the surplus within hours. Give a person who is not deficient an infusion of vitamin C and B vitamins and you have produced expensive urine plus a brief placebo effect of the kind well documented in trials of infusion therapy. No good randomised evidence shows that vitamin drips lift energy, immunity, hangovers, skin or athletic performance in people whose levels are normal, and no professional body recommends them. What does carry evidence is narrow and specific. Vitamin B12 by injection for proven deficiency, above all pernicious anaemia and certain bowel surgery, where absorption fails and oral replacement cannot work. Intravenous iron for iron deficiency where oral iron has failed, is not tolerated or where correction is needed fast, a licensed treatment with clear indications. And oral replacement of vitamin D, iron, B12 and folate where a blood test has demonstrated a deficiency. Measurement is the dividing line throughout. We test first, treat what is low, recheck to prove it has corrected, and do not sell infusions to people whose levels are normal. Comprehensive panel with consultation from £495. Fees appear further down this page.

Reviewed by the medical team at The Wellness. Last updated 1 September 2026.

Ask what you actually need on WhatsApp or email team@thewellnesslondon.com or call 020 3951 3429.

Do vitamin drips work

In somebody who is not deficient, no, and the physiology accounts for it. Vitamin C and the B vitamins are water-soluble, so as soon as plasma concentration passes the renal threshold the kidneys start clearing the excess. High intravenous doses generate a sharp peak followed by a rapid fall, and nothing is banked for later.

The trial evidence is sparse and unpersuasive. Studies of the intravenous micronutrient formulation most often marketed have failed to show benefit over placebo for fatigue or wellbeing in people without deficiency, and the improvements reported fit neatly with the well-documented effect of the infusion itself, which ranks among the most powerful placebo interventions in medicine because it combines time, attention, a clinical setting and a needle.

The risks are modest but real and deserve stating. Infection at the cannula site and phlebitis. Fluid overload in people with heart or kidney disease. Electrolyte disturbance where high-dose infusions are repeated. And high-dose intravenous vitamin C is contraindicated in glucose-6-phosphate dehydrogenase deficiency, in which it can trigger haemolysis, which is precisely why testing beforehand matters and is so often skipped.

There is an opportunity cost nobody raises either. Somebody spending £250 a month on infusions for fatigue has bought something unevidenced in place of the blood panel that would have identified the iron deficiency, thyroid disease or sleep apnoea genuinely responsible.

What does have evidence

Vitamin B12 by intramuscular injection for proven deficiency where absorption is impaired. Pernicious anaemia, in which intrinsic factor antibodies block absorption, needs lifelong injections and will not respond to oral replacement. The same holds after gastrectomy, ileal resection or bariatric surgery. Where the deficiency is dietary and absorption is intact, high-dose oral B12 does the job and injections are unnecessary, which is worth knowing before you commit to a course.

Intravenous iron where iron deficiency is established and oral iron has failed, is not tolerated or would take too long. It is a licensed treatment with defined indications, among them heavy menstrual bleeding, inflammatory bowel disease, chronic kidney disease, pregnancy and pre-operative optimisation. Stores are corrected across 1 or 2 appointments rather than 3 to 6 months. What it also demands is an explanation for the low iron, since British Society of Gastroenterology guidance treats unexplained deficiency in men and postmenopausal women as gastrointestinal blood loss until proven otherwise.

Oral vitamin D replacement where a measured level is low, which by the end of a British winter covers a large share of the population. Oral loading followed by maintenance works and no injection is needed.

Folate, and targeted replacement of anything else a blood test has shown to be deficient, dosed against the result and rechecked to confirm correction rather than carried on indefinitely.

Ask about iron or B12 treatment on WhatsApp or email team@thewellnesslondon.com.

Why fatigue is rarely a vitamin problem

Tiredness is what brings most people to a drip menu, so this is the section that counts. Fatigue has a defined differential and vitamin deficiency forms only part of it.

Iron deficiency is the commonest and the most frequently missed, because ferritin under 30 means the stores are empty while the full blood count still reads normal, so a report stating no anaemia does not rule it out. Symptoms are common below 50.

Thyroid disease affects around 1 in 20 people, women some 8 to 10 times more often than men, and needs TSH, free T4 and antibodies rather than TSH in isolation. B12 and folate deficiency, and vitamin D insufficiency, are real and are found by testing rather than guessed at. Obstructive sleep apnoea erodes energy, mood and concentration while the person sleeps straight through the cause. Perimenopause generates fatigue, brain fog and broken sleep in women in their 40s and is routinely attributed to something else. Prediabetes, coeliac disease, depression, medication effects and sustained sleep debt round out the list.

Testing the whole differential in a single panel, rather than one hypothesis at a time, is what turns a 6-month question into a 2-week one, and it costs a good deal less than a course of infusions.

How we approach it

Assessment comes first, covering history, duration, medication, diet, menstrual history, gut symptoms and anything else pointing towards a cause rather than a deficiency.

Blood work follows at an accredited partner laboratory, covering ferritin and full iron studies, B12 with active B12 or methylmalonic acid where the result sits borderline, folate, vitamin D, full blood count, thyroid with antibodies, HbA1c, kidney and liver function, inflammatory markers and coeliac serology where indicated.

Then treatment matched to what was found. Oral replacement where absorption is intact, which covers most people. B12 injections where malabsorption is established, with a loading course and maintenance. Intravenous iron where oral iron has failed or correction is needed quickly, given under medical supervision with the cause of the deficiency investigated rather than ignored.

And a recheck, because replacement exists to correct something, and carrying on with a supplement without confirming it has worked is how people end up taking things for years to no purpose.

What we will not do is sell an infusion to somebody whose levels are normal. It is the most requested thing on this page, and declining it is the reason everything else here can be trusted.

What does it cost in London

IV vitamin drip clinics in London charge £150 to £400 per infusion, with courses of 6 to 10 sessions widely promoted at £1,000 to £3,000, and mobile services adding a premium for attendance. Vitamin B12 injection courses come to £50 to £150 per injection. Consultant haematology and gastroenterology appointments cost £250 to £500 before any treatment. Comprehensive imaging and executive programmes at the top of the London market pass £32,000.

At The Wellness, testing and treatment both follow the assessment, and nothing is sold on request alone. All figures are from prices.

• Executive Health Programme, our most comprehensive assessment with full biomarker profiling and coordinated imaging, from £11,995.

• Complete Biomarker Assessment, over 100 markers with extended review, from £1,400.

• Iron infusion with diagnosis, investigation of the underlying cause, treatment and follow-up testing, from £1,095. Infusion alone where the diagnosis is already established, from £895.

• Comprehensive Blood Panel covering ferritin and full iron studies, B12, folate, vitamin D, thyroid with antibodies, HbA1c and inflammatory markers, with consultation and interpretation, from £495.

• Extended 45-minute consultation for persistent fatigue with a written plan, from £395.

• Targeted Blood Panel with interpretation, from £295.

• In-person consultation from £220. Same-day video consultation from £150. Mini consultation from £59.

• Vitamin B12 injection course where malabsorption is established, quoted at the consultation. Targeted oral supplementation prescribed against measured deficiency and rechecked to confirm correction.

Appointments within the week at 10 Portman Square, Marylebone, 3 minutes from Baker Street.

Why The Wellness is the best place in London for this

Because we measure before we treat, which sounds too obvious to state and is the reverse of how this market runs. A drip menu sells one formulation to everyone, whereas a blood panel tells you which of 8 possible causes is yours.

Because the treatments that do have evidence are delivered properly. Intravenous iron with the cause of the deficiency investigated rather than corrected and forgotten, which matters because unexplained iron deficiency in men and postmenopausal women is a finding that demands a gastrointestinal explanation. B12 injections where malabsorption is established, and high-dose oral B12 where it is not, because injections are unnecessary in dietary deficiency and saying so costs us a course.

Because the treatments without evidence are not on sale. No vitamin C megadose infusions, no immunity drips, no hangover packages. That decision forfeits real revenue every week and it is what makes the rest of the advice credible.

And because fatigue gets investigated as fatigue. Thyroid with antibodies, ferritin read against the right threshold, a sleep study where snoring is part of the story, perimenopause considered in women in their 40s, and coeliac serology where the gut symptoms fit. Most people who arrive asking for a drip leave with a diagnosis instead, which is cheaper for them and considerably more useful.

Related reading

Tired, cold and gaining weight covers the full fatigue differential, iron infusion covers intravenous iron in detail, biomarker screening covers the panel and what each marker means, thyroid blood tests explained covers thyroid interpretation, and insomnia and sleep problems covers sleep as a cause.

Book an assessment on WhatsApp or call 020 3951 3429.

Frequently asked questions

Do IV vitamin drips work

In people who are not deficient, no good randomised evidence shows they improve energy, immunity, skin or performance, and no professional body recommends them. Vitamin C and the B vitamins are water-soluble, so the kidneys clear the excess within hours. The improvements people describe are consistent with the placebo effect of an infusion, which ranks among the strongest in medicine.

Are vitamin drips safe

Largely, with small but real risks including cannula site infection, phlebitis, fluid overload in people with heart or kidney disease, and electrolyte disturbance where high-dose infusions are repeated. High-dose intravenous vitamin C is contraindicated in glucose-6-phosphate dehydrogenase deficiency because it can cause haemolysis, which is why testing beforehand matters.

When are B12 injections actually needed

Where absorption is impaired, meaning pernicious anaemia with intrinsic factor antibodies, or after gastrectomy, ileal resection or bariatric surgery. Where the deficiency is dietary and absorption is intact, high-dose oral B12 works and injections are unnecessary.

When is an iron infusion appropriate

Where iron deficiency is established and oral iron has failed, is not tolerated or would work too slowly, including heavy menstrual bleeding, inflammatory bowel disease, chronic kidney disease, pregnancy and before surgery. It corrects stores across 1 or 2 appointments rather than 3 to 6 months, and the cause of the deficiency should always be investigated alongside.

I am exhausted. Should I have a drip

Almost certainly not. Test first. Iron deficiency, thyroid disease, B12 and vitamin D deficiency, sleep apnoea, perimenopause, prediabetes and coeliac disease all present as fatigue, and a comprehensive panel with consultation at £495 identifies which applies for considerably less than a course of infusions.

What should I take if my levels are normal

Nothing on a routine basis. Supplementing without a measured deficiency has not been shown to improve outcomes in healthy adults, and some high-dose supplements bring risks of their own. What does work is sleep, exercise including resistance training, treating whatever condition is found, and rechecking instead of taking things indefinitely.

The Wellness is a doctor-led private healthcare group providing medical care from 10 Portman Square, Marylebone, adjacent to Harley Street. All doctors are GMC-registered. Blood analysis is performed by accredited laboratories. Treatment is provided only following a consultation and clinical assessment and only where the findings support it. In an emergency call 999. This article is general information and not a substitute for medical advice about your own health.

Enquire now on WhatsApp or email team@thewellnesslondon.com or call 020 3951 3429.

References. NICE Clinical Knowledge Summaries on anaemia, vitamin B12 and folate deficiency, and vitamin D deficiency in adults. British Society of Gastroenterology guidelines on the management of iron deficiency anaemia. British Society for Haematology guidelines on the investigation and management of cobalamin and folate deficiencies. Published randomised evidence on intravenous micronutrient therapy and its lack of benefit over placebo in people without deficiency. Published evidence on placebo effects of invasive and infusion interventions. Published guidance on high-dose intravenous vitamin C and glucose-6-phosphate dehydrogenase deficiency. Summary of product characteristics for licensed intravenous iron preparations. Published 2026 London intravenous vitamin therapy market pricing.
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