Vitamin B12 Drops
1,000µg MH3A®


High-dose vitamin B12 MH3A® drops with 1,000µg of vitamin B12 per drop. Contains all 3 natural, bioactive forms of vitamin B12 as an active complex. Ultra pure, water-based formula with edible alcohol used as a stabiliser. Only 3 ingredients, no preservatives. Premium B12 produced in the EU. 300 drops
  • B12 MH3A-D® formula: Harmonious mixture of 5 premium B12 active ingredients 
  • Bioactive vitamin B12 in the form of methylcobalamin, hydroxocobalamin, and adenosylcobalamin
  • 2 bioactive coenzyme forms with high bioavailability
  • High-dose: 1,000µg per drop
  • Vitamin B12 for homocysteine metabolism, emotional function, immune system, reduction of tiredness and fatigue
  • Vitamin B12 for energy metabolism, the central nervous system, the production of red blood cells and cell division
  • Drops: ideal for direct absorption in the mouth (sublingual administration)
  • Quick absorption into the bloodstream, circumventing absorption difficulties in the intestines
  • Precise administration with a glass dropper

Delivery : 1–3 business days

Incl. VAT, excl. Shipping

€1,690.00 / 1l
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Incl. VAT, excl. Shipping

€1,690.00 / 1l
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Premium Bioactive Ingredients

  • B12 MH3A-D® formula: Bioactive vitamin B12 in the form of methylcobalamin, hydroxocobalamin, and adenosylcobalamin
  • High-dose: 1,000µg per drop
  • Drops: ideal for direct absorption in the mouth (sublingual administration)
  • Quick absorption into the bloodstream, circumventing absorption difficulties in the intestines
  • Precise administration with a glass dropper
  • All 3 natural and bioactive forms of vitamin B12
  • 2 bioactive coenzyme forms with high bioavailability
  • 5 different B12 ingredients
  • Premium B12 ingredient produced in the EU
  • 100% naturally sourced

How are we different?

Not all forms of vitamin B12 have the same level of efficiency. Standard food supplements often contain only synthetic forms of vitamin B12. These must first be converted into the biologically active forms in the body before they can be utilised. Sunday Natural Vitamin B12 MH3A® provides the full spectrum of bioactive and natural forms of vitamin B12.

Common B12 vitamin supplements usually provide only one active ingredient. In our body and natural foods, however, different active forms occur. All forms show a different effect and enter the body partly via different metabolic pathways, so that it is individually different which B12 form is best absorbed.

As a pioneer in B12 products, our innovative Vitamin B12 MH3A® formula supplies B12 in the same form as it occurs in natural foods; as a combination of all three natural and bioactive B12 compounds. These three MHA (methylcobalamine, hydroxocobalamin, and adenosylcobalamin) forms each fulfil unique functions in the body and have different effect profiles. Our MH3A® formula contains all three in a balanced ratio and thus delivers an ideal and well-rounded supply of vitamin B12. In nature, too, all three forms are always found together, both in our bodies and in food. There are almost exclusively supplements on the market with only one of the three B12 active ingredients: methylcobalamin, hydroxocobalamin or adenosylcobalamin.

The advantage of these drops is that the vitamin B12 can be absorbed directly through the mucous membrane of the mouth. As a result, potential digestive difficulties in the intestines can be avoided and the bioavailability of the B12 is increased. Through this method, the B12 enters the bloodstream directly and does not need to pass through the intestines or liver.

Our vitamin B12 drops are water-based and contain no glycerin. They are free from preservatives. To stabilise this product, we add a small quantity of pure, edible alcohol.


  • Premium active ingredients in their purest form
  • Sourced directly from the world’s best producers
  • Our select raw materials are the basis of all our formulations
  • Complete avoidance of all unnecessary additives and adjuvants
  • Exclusive use of valuable natural ingredients for additives
  • We voluntarily declare all ingredients
  • All extractions performed without the use of chemical solvents
  • Custom production when necessary, in order to achieve the highest possible level of purity
  • Independent laboratory testing available on product pages
  • Raw materials sourced only from premium suppliers who are committed to fair working conditions
  • Amber glass and compostable pouches used for packaging
  • Vegan capsule shells, free from PEG and carrageenans
  • Packaged in the EU according to HACCP, GMP and ISO 22000:2018 standards
  • Stored in non-toxic containers
  • Shipped in mineral oil-free boxes
  • All products guaranteed 100% free from magnesium stearate, silicon dioxide, nanoparticles (no legal opportunism), genetic engineering, artificial colours and flavours, titanium dioxide and added sugar & sweeteners


Vitamin B12 (Cobalamin)

Vitamin B12 takes on a variety of important functions in the organism. These include helping to reduce tiredness and fatigue and maintaining a normal energy metabolism. It contributes to a normal function of the psyche, immune and nervous system, it supports the formation of red blood cells and is beneficial for a normal homocysteine metabolism. Furthermore, the body needs vitamin B12 cell division. Vitamin B12 acts as a so-called coenzyme in the body. This means that vitamin B12 is necessary for certain enzymes in our body to fulfil their tasks. The related processes are directly dependent on vitamin B12 and cannot take place without the vitamin.

Vitamin B12 MH3A® Formula

Vitamin B12 (cobalamin) exists in different chemical forms, each with different functions within the body. The natural forms of vitamin B12 that can be readily absorbed by the body are described as "bioactive coenzymes". Synthetic forms of Vitamin B12 such as cyanocobalamin must be first converted into a natural form by the body in order to be effective, which is why we use naturally bioactive forms of Vitamin B12 that the body can directly use.

The coenzyme forms of vitamin B12 that are biologically active in the body are called methylcobalamin and adenosylcobalamin. They both act at different places and in completely different reactions, which is why humans need both forms of vitamin B12 and can also convert them into each other. Methylcobalamin acts in the cell plasma as part of the methylation cycle, which has a far-reaching influence on various health areas such as blood formation, psyche and the nervous system. On the other hand, adenosylcobalamin works in the mitochondria, the energy power plants of our cells. It is there part of the citrate cycle, the central metabolic cycle for the production of energy. Hydroxocobalamin is another natural form of vitamin B12 that is found in many food products. Most of the vitamin B12 in the blood is in the form of hydroxocobalamin. Hydroxocobalamin binds particularly well to vitamin B12 transport molecules and is therefore excreted less quickly; it is considered the B12 with the best depot properties. Hydroxocobalamin can be easily converted by the body into the active coenzyme forms as needed.

Health Benefits of Vitamin B12 According to the European Food Safety Authority (EFSA):

Vitamin B12 contributes to:

  • Normal energy-yielding metabolism
  • Normal functioning of the nervous system
  • Normal homocysteine metabolism
  • Normal psychological function
  • Normal red blood cell formation
  • The normal function of the immune system
  • The reduction of tiredness and fatigue
  • Vitamin B12 has a role in the process of cell division


Recommended Dosage

Place one drop (1,000µg vitamin B12) under the tongue daily. Shake well before use.

For optimal sublingual administration, place a drop under the tongue or on the inside of the cheek. Avoid swallowing for as long as possible to allow the drops to be absorbed. 

Daily Requirements (DGE)

The German Nutrition Society (DGE) recommends a minimum of 3µg vitamin B12 per day for adults.

B12 absorption

The human body can only absorb small quantities of vitamin B12 through food and supplements. Only approximately 1-2µg vitamin B12 per dosage can be actively absorbed through the special "intrinsic factor" protein and a further 1% of the dosage is absorbed through passive diffusion. The total supplement intake is estimated based on the combination of these two factors.

According to this calculation, Sunday Natural B12 MH3A-D® 1,000µg in drops enables an intake of 10-12µg Vitamin B12 per drop.


Not suitable for pregnant women, nursing mothers and children.

Food Supplement

Do not exceed the recommended dose. Food supplements cannot replace a balanced and varied diet. Keep out of reach of children.


Store in a cool, dry place away from direct sunlight and heat.


Ingredients: Distilled Water, Alcohol, Vitamin B12 (in the form of Hydroxocobalamin, Methylcobalamin, and Adenosylcobalamin).

Ingredients per Daily Dose (1 Drop/31mg) % NRV*
Vitamin B12 1,000µg 40,000 %
  of which methylcobalamin   333µg 13,333 %
  of which hydroxocobalamin   333µg 13,333 %
  of which adenosylcobalamin   333µg 13,333 %

* Nutrient Reference Value


All eight essential B vitamins work together. Numerous metabolic processes in the body require them; they can only achieve optimal functionality if each vitamin is in sufficient supply. Therefore, in many cases, it makes sense to supplement these vitamins together.

Product Details

German Pharmaceutical Number (PZN) 15997097
Origin All ingredients from the EU

In-house production in Europe, bottling and encapsulation in the EU according to HACCP, GMP and ISO 22000:2018 standards

Finished products packaged in amber glass jars and stored in non-toxic containers Shipping in mineral oil-free boxes

Packaging Amber glass bottle to protect against light and oxidation (free from plasticisers and BPA)
To Reuse Remove product label by soaking the bottle in warm water for 5 minutes. Glue residue can be removed with dish soap

Laboratory Tests

The purity of our formulas is important to us. This is why we have both our raw ingredients as well as our finished products extensively tested by independent laboratories to confirm purity and active ingredient content. Here, we have provided the results of some of the tests carried out on this product.

See tests

Sunday Natural

Our Philosophy

For thousands of years, cultures all over the world have been using medicinal plants and nutritious foods to naturally foster and maintain vitality and good health.

With our products, we try to emulate this ancient wisdom as much as possible.

Consequently, our philosophy is simple: everything we do meets the highest standards of quality and purity; our focus is on organic and natural ingredients.

We follow this philosophy with meticulous care on all levels and down to every last detail.

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