Grey mornings, classroom afternoons – so where is your child's vitamin D meant to come from?
Dr. Wunder's Duo drop answers that with one drop a day: vitamin D3 and K2 in a water-based formulation – built for family routines rather than swallowing capsules.
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Immune system, muscles, bones & teeth
Vitamin D contributes to the normal function of the immune system, to the maintenance of normal muscle function and to the maintenance of normal bones and teeth.
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Vitamin K for bones & blood clotting
Vitamin K contributes to the maintenance of normal bones and to normal blood clotting.
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Vegan – D3 from lichen
The vitamin D3 is sourced from lichen rather than lanolin – the whole recipe is vegan.
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Pure-substance principle
Actives only – with no added artificial additives, colourings, flavourings or preservatives.
Between breakfast, the school run and homework, there is little time left for the outdoors. And even when there is: from October to March the sun over Central Europe sits too low for the skin to produce vitamin D in any meaningful amount. Parents know the dilemma – the child should be outside more, the timetable says otherwise.
That is where the Duo drop comes in. Both fat-soluble vitamins are finely dispersed in water, so the drop goes straight into food – no capsule, no negotiating at the table. One small step at breakfast is all the routine asks for.
Behind the drop stands Dr. Wunder OG from Graz – an Austrian manufacturer that keeps its recipes deliberately short. The MCT oil from coconut comes from certified organic production, and the pack carries the company's own "Geprüfte Qualität" seal. Read the ingredient list and you are done after five items – which is precisely the point.
📊 D3+K2 Kids Duo by the numbers
1000 IU
vitamin D3 per drop
40 µg
vitamin K2 (MK-7) per drop
1 drop
daily dose for children
30 ml
content in the glass bottle
📋 Recommended intake
For children from 1 year, take 1 drop daily, ideally with or after a meal containing fat.
Nutritional information per daily dose (1 drop)
| Nutrient |
Amount |
% NRV* |
| Vitamin D3 |
1000 IU / 25 µg |
500 |
| Vitamin K2 |
40 µg |
54 |
* % of the nutrient reference value under Regulation (EU) 1169/2011
Trade name: Food supplement with vitamin D3 and vitamin K2
Ingredients: Water, MCT oil* (from coconut), glycerol, vitamin K2 (MK-7, all-trans), vitamin D3 (from lichen). *from certified organic production
Net quantity: 30 ml
Why put D3 and K2 together in one drop?
Both vitamins work together in calcium metabolism. Vitamin D contributes to normal absorption/utilisation of calcium and phosphorus. Vitamin K, in turn, is needed to activate proteins such as osteocalcin, which bind calcium in bone. The combination covers both sides of that process – without measuring out two separate bottles.
What does "MK-7 all-trans" mean?
MK-7 is a long-chain form of vitamin K2. "All-trans" describes the spatial structure of the molecule: only this natural configuration is biologically active, while cis fractions are considered inactive. The declaration therefore signals the grade of the raw material used.
⚠️ Mandatory information: Do not exceed the stated recommended daily dose. Keep out of reach of young children. Food supplements are not a substitute for a balanced, varied diet and a healthy lifestyle.
📦 Storage: Store at room temperature and protected from light.
💬 Frequently asked questions
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From what age is the Duo drop suitable?+
From the first birthday. The intake recommendation applies to children from 1 year – for vitamin D during the first year of life, speak to your paediatrician.
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What is the easiest way to give the drop to my child?+
Straight onto a spoon, or into yoghurt, porridge or muesli. The drop disperses well in food – no debates about capsules or tablets.
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What does the drop taste like?+
Largely neutral, with a mild sweetness that comes from the glycerol it contains. In yoghurt or porridge it goes practically unnoticed.
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Why should the meal contain fat?+
Vitamin D3 and K2 are fat-soluble – they are absorbed together with dietary fat. Butter on bread, yoghurt, or muesli with milk is already enough. That is why the intake recommendation mentions a meal containing fat.
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How does the water-based formulation differ from oily D3 drops?+
Classic D3 drops are oil-based. The water-based variant is pleasant to use, leaves no oily film, and is easy to dose cleanly.
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Can my child take the drop all year round?+
The intake recommendation sets no time limit. Many families rely on it above all in the low-sunlight months from October to March. What matters: do not exceed the stated daily amount.
Goes well with this
Responsible Person (GPSR, EU 2023/988) & Manufacturer: Dr. Wunder OG · Zanklstraße 49 · 8051 Graz · Austria · info@drwunder.at
