In short: Vitamin B12 (cobalamin) is a water-soluble vitamin that, in its natural form, occurs almost exclusively in foods of animal origin – meat, fish, eggs and dairy products. It contributes to the reduction of tiredness and fatigue, to normal functioning of the nervous system and to normal red blood cell formation; in food supplements it is most commonly found as cyanocobalamin or methylcobalamin.
Edited by the Vitafoodonline.hu editorial team · Last updated: October 21, 2026
Table of Contents
- Why does the body need vitamin B12?
- What forms are there: cyanocobalamin or methylcobalamin?
- Who may want to pay attention to their vitamin B12 intake?
- What to look for when buying vitamin B12
- Comparison of our products containing vitamin B12
- Related Products
- Frequently Asked Questions
- Order vitamin B12 from Vitafoodonline.hu
Why does the body need vitamin B12?
Vitamin B12 is a member of the B vitamin group, and its molecule has a cobalt atom at its center – hence the name cobalamin. According to the health claims authorized in the European Union, vitamin B12:
- contributes to normal energy-yielding metabolism;
- contributes to normal functioning of the nervous system;
- contributes to normal homocysteine metabolism;
- contributes to normal psychological function;
- contributes to normal red blood cell formation;
- contributes to the normal function of the immune system;
- contributes to the reduction of tiredness and fatigue;
- has a role in the process of cell division.
The claim on the reduction of tiredness and fatigue is also authorized for magnesium, which is why the two nutrients are often mentioned together.
What forms are there: cyanocobalamin or methylcobalamin?
In food supplements, vitamin B12 comes in several forms:
- Cyanocobalamin: the most widespread, stable form, which the body converts during utilization. It is also common in vegan products.
- Methylcobalamin: one of the active forms of vitamin B12 that is also present in the body.
- Adenosylcobalamin: another form that also occurs in the body, sometimes combined with methylcobalamin.
- Hydroxocobalamin: a form used mainly in medicines.
In terms of format, vitamin B12 is available as drops, lozenges, capsules and drinkable vials, as well as part of B-complex and multivitamin products. The amount is stated on the label in micrograms (µg).
Vitamin Finder – free, 1 minute
Drops or vials – which B12 is right for you? Answer 5 short questions and we will recommend 2–3 in-stock products based on your age, goal, preferred format and budget.
Who may want to pay attention to their vitamin B12 intake?
- People following a vegan or vegetarian diet: since vitamin B12 in its natural form is found almost only in foods of animal origin, it is especially worth watching your intake on a plant-based diet. In this case, it is also worth looking for a vegan source of vitamin D3.
- Older adults: many people pay closer attention to B vitamins as they get older.
- People in a busy, demanding phase of life who want to supplement their varied diet.
- Pregnant and breastfeeding women: they should ask their doctor for advice on intake.
If you take medication regularly, talk to your doctor or pharmacist about vitamin B12 supplementation as well.
What to look for when buying vitamin B12
- Form: the label states whether the product contains cyanocobalamin, methylcobalamin or a combination of these.
- Amount and NRV%: check how many µg of vitamin B12 one serving provides and what percentage of the nutrient reference value it covers. You will always find the exact dosage on the package.
- Additional active ingredients: standalone B12, B-complex, or a product that also contains iron and folate – choose according to your goals.
- Vegan labeling: vitamin B12 is typically produced by bacterial fermentation, but the capsule or other ingredients may be of animal origin.
- Format: drops allow flexible dosing, while drinkable vials are pre-measured.
Comparison of our products containing vitamin B12
The following MARNYS products, currently in stock, contain vitamin B12. You will always find the exact composition and dosage on the package.
| Product | Format | Pack Size | Who It Is For |
|---|---|---|---|
| Marnys Liquid Vitamin B12 Drops | Liquid with dropper, cyanocobalamin, vegan | 30 ml | For the whole family according to the manufacturer; for children and during pregnancy, ask a professional for advice |
| Marnys Inmupec Defens | Orange-flavored vegan drinkable vial with 9 vitamins (including B12), sea buckthorn, echinacea and elderberry | 20 × 10 ml (200 ml) | Adults |
| Marnys Ferrobine Max | Cherry-flavored drinkable vial with iron bisglycinate, zinc and B-complex (including B12) | 20 × 10 ml (200 ml) | Adults with increased iron needs, athletes, vegans; for children and during pregnancy, with professional advice |
Related Products
- Marnys Liquid Vitamin B12 Drops – vegan vitamin B12 with cyanocobalamin, dosed with a dropper.
- Marnys Inmupec Defens – vegan, orange-flavored drinkable vial with nine vitamins, including B12.
- Marnys Ferrobine Max Iron Control – iron bisglycinate, zinc and B-complex in a single-dose drinkable vial, also suitable for a vegan diet.
Liquid Vitamin B12
Easy-to-dose liquid B12, also suitable for a vegan diet. Orders over 50,000 HUF get a 5% cart discount.
Frequently Asked Questions
Which foods contain vitamin B12?
In its natural form, almost exclusively foods of animal origin: meat, organ meats, fish, eggs and dairy products. Some plant-based drinks and foods are fortified with vitamin B12.
What is the difference between cyanocobalamin and methylcobalamin?
Both are forms of vitamin B12. Cyanocobalamin is a stable, widely used form that the body converts, while methylcobalamin is one of the forms also present in the body. The authorized claims apply to vitamin B12 in general.
Why do vegans need to pay attention to vitamin B12?
Because vitamin B12 in its natural form occurs almost only in foods of animal origin, so on a plant-based diet it is worth getting it from a food supplement or fortified foods.
How much vitamin B12 should I take?
Please follow the dosage stated on the package and do not exceed the recommended daily dose. For personalized advice, consult your doctor or pharmacist.
Are Marnys B12 drops vegan?
Yes, Marnys Liquid Vitamin B12 Drops are a vegan formula that contains vitamin B12 in the form of cyanocobalamin.
Order vitamin B12 from Vitafoodonline.hu
Order conveniently from the Vitafoodonline.hu webshop! Choose from our vitamin B12 drops and drinkable vials that also contain vitamin B12 – you will find our full range in the MARNYS vitamins and food supplements category. We offer a quantity discount on orders of 10 or more items, in-stock products ship with next-day delivery available, and our loyalty program lets you save even more with every purchase. Orders over 50,000 HUF get a 5% cart discount, and GLS shipping is free over 20,000 HUF. Food supplements are not a substitute for a balanced, varied diet and a healthy lifestyle.
