Vitamin injections offer immediate absorption and are especially effective for fatigue, deficiency symptoms or reduced intestinal absorption. We offer vitamin injections all week long in both Rotterdam and Dordrecht.
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How does it work?
You simply report to the counter — you will be asked about your complaints (fatigue, recovery, energy, suspected deficiency) and based on this, we will discuss which injection suits you best. No appointment with Dr. Björn or Dr. Claudia Mulder required; vitamin injections are available all week during our opening hours.
Standard B12 is 1000 mcg hydroxocobalamin intramuscularly. B complex contains B1, B2, B3, B5, B6 and B12. Magnesium and vitamin D are administered in a similar manner, with adjusted doses. Hydroxocobalamin remains in the body longer than cyanocobalamin — therefore preferred in the Netherlands.
If you have any doubts about a deficiency, we recommend blood tests in advance — your doctor can perform this. If an underlying deficiency emerges, we tailor the preparation and frequency exactly accordingly.
What can you expect?
A session lasts 5-10 minutes including intake at the counter. The injection feels like a normal intramuscular injection; mild muscle pain at the injection site may last 24 hours.
Some patients report increases in energy within 1-3 days — especially if there was an underlying deficiency.
Scientific substantiation
Intramuscular B12 is an established treatment for pernicious anemia and B12 deficiency, recommended by international hematological guidelines. In non-deficient patients there is no strong evidence of clinical benefit over oral supplementation.
More about this treatment
Above you can read how a vitamin injection works. Here you can read why we give them: which shortages we see most often in practice, and what such a shortage does to you.
Vitamin D
A vitamin D deficiency is the deficiency that we encounter here every day. It is easy to supplement, and the benefits of good vitamin D levels are great.
In theory, you produce enough vitamin D yourself by sitting in the sun every day, and you get the rest from your food. In practice, almost no one succeeds. Our Dutch climate is against this, and so is our lifestyle. We work indoors all day long, without sunlight, and in winter there are few sunny days.
In the Netherlands, a minimum of 40 is used for blood tests. We think it is better to be around 80, or slightly higher.
We use a preparation of vitamin D (D3) with 100,000 IU per injection. This usually lasts about three months. If your deficiency is severe, multiple injections in quick succession are often necessary.
How you can recognize a vitamin D deficiency
- Fatigue and general weakness — your energy is low and remains low.
- Muscle and joint pain — sometimes a general feeling of discomfort, sometimes pain in a specific area.
- Bone pain — vitamin D keeps your bones strong. If they are deficient, they can hurt and are more likely to break.
- Susceptibility to infections — your immune system needs vitamin D to do its job.
- Poor wound healing — wounds take longer to close.
- Mood and mental health — there is evidence that a deficiency contributes to sadness and anxiety.
- Hair growth — some studies indicate that a severe deficiency can cause hair loss.
Vitamin B12
We also see a lot of B12 deficiencies. One group stands out: we see patients every day who develop a deficiency due to the use of laughing gas and sometimes suffer neurological damage. Be careful with that. Sometimes that damage cannot be repaired. So replenish your B12 on time — this is the fastest way through injections.
How you can recognize a vitamin B12 deficiency
- Fatigue and weakness — a deficiency can cause anemia, which exhausts you.
- Anemia — you look pale, become short of breath quickly and your heart beats faster.
- Neurological complaints — tingling or burning sensation in hands and feet, and difficulty with balance and coordination.
- Memory problems — difficulty paying attention and forgetting things.
- Mood swings — they make some people sad.
Iron
We supplement iron with a series of injections into the muscle. We see iron deficiency regularly, especially in young women. The consequences are serious, but easily treatable. It occurs very rarely in men.
How you can recognize an iron deficiency
- Fatigue — the most common sign: you are tired and weak, and that remains.
- Pale skin — your body produces less hemoglobin, the substance that turns your blood red.
- Shortness of breath — your blood carries less oxygen, so you get out of breath more quickly. Especially during exertion.
- Palpitations — your heart has to work harder to get that oxygen around, and beats faster or irregularly.
- Cold hands and feet — due to poorer blood circulation.
- Headache and dizziness — especially when moving quickly or standing up.
- Brittle nails and hair loss — the condition of your hair and nails also changes.
- Anxiety and panic attacks — in our experience sometimes an accompanying symptom of an iron deficiency.
This is how a session goes
Each process is tailor-made, but this is what a typical course looks like — from first intake to pain-free and maintenance. You always know exactly where you stand.
Report at the counter
You report to the counter. No doctor's appointment necessary — vitamin injections are available during business hours all week.
Discuss complaints
At the counter you will be asked about your complaints and goals (fatigue, energy, recovery after illness, deficiency). In consultation we will choose which injection suits you best.
Intramuscular injection
B12, B complex, magnesium or vitamin D — prepared sterile and administered in the deltoid (upper arm) or gluteus (buttock). Slight muscle pain possible for 24 hours.
Energy effect
In case of underlying deficiency: increase in energy within days. More subtle effect in healthy people. Maintenance per month or quarter.
Frequently asked questions
Do healthy people need this?
With normal blood levels, oral supplementation is usually sufficient and cheaper.
Which form of B12 is best?
Hydroxocobalamin — longer lasting than cyanocobalamin.
Will it be reimbursed?
Usually yes, if medically indicated by a GP/specialist; not for wellness purposes.
How often should I come?
Depends on preparation and cause; in case of pernicious anemia every 1-3 months for life.
Can I get too much?
B vitamins are water soluble (surplus is excreted). With vitamin D and magnesium, be careful in case of overdose.
Not suitable for allergy to cobalamin, Leber's disease (hereditary), hypervitaminosis D, severe renal insufficiency or blood clotting disorders. Ask your doctor to first check a blood value if you suspect a deficiency.
Scientific references
- Pasquini A, Prejbeanu R, Russu O, D’Ambrosi R, Faur CI, Muccioli GMM, Mioc ML. Effect of vitamin D on anterior cruciate ligament injury rates and post-reconstruction function-A systematic review. J Exp Orthop. 2025 Apr 1;12(2):e70224. doi: 10.1002/jeo2.70224. PMID: 40170713; PMCID: PMC11959628.
