Nutrador® Opti K2-D3 drops combine Vitamin K2 (MK-7) and Vitamin D3 (Cholecalciferol) in a high-quality, natural oil base.
These two fat-soluble vitamins support each other in their functions: Vitamin D3 helps to absorb calcium from food, while Vitamin K2 ensures that the calcium reaches where it is needed – in the bones and not in the vessels.
The drop form allows particularly good absorption and flexible dosing – ideal for daily needs.
Vitamin D3 & K2 – the power duo for your health
Vitamin D3 and K2 are two essential fat-soluble vitamins that perform important functions in the body.
Vitamin D3 supports the absorption of calcium from food and is crucial for building and maintaining healthy bones. It also strengthens the immune system and contributes to muscle health.
Vitamin K2 regulates calcium metabolism and ensures that calcium is deposited in the bones instead of accumulating in the arteries. This supports the elasticity of the vessels and heart health.
In our latitudes, sunlight is often insufficient to produce enough vitamin D3. At the same time, vitamin K2 is usually present only in small amounts in the diet – a combined deficiency is therefore widespread.
Why D3 & K2 in oil form are particularly effective
The drop form in a high-quality, natural oil base offers decisive advantages for the absorption and stability of the vitamins.
High bioavailability
Fat-soluble vitamins like D3 and K2 need a carrier medium to be effectively absorbed. Studies show that their absorption in oil is significantly better than in dry forms.
Optimal stability
The used ORGANIC rapeseed oil and ORGANIC argan oil protect the sensitive ingredients from oxidation and preserve their full effectiveness.
Easy dosing
Thanks to the liquid form, the drops can be dosed precisely and easily integrated into everyday life.
Ingredients and composition
Each drop is precisely formulated to provide you with the best possible support:
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Vitamin K2 (MK-7): 50 µg per 2 drops (= 167% NRV). Supports the targeted incorporation of calcium into the bones and contributes to vascular health. 
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Vitamin D3 (cholecalciferol): 50 µg per 2 drops (= 225% NRV). Promotes calcium absorption and supports the immune system. 
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ORGANIC rapeseed oil & ORGANIC argan oil: Rich in unsaturated fatty acids, they protect the vitamins and improve their absorption. 
How K2D3 drops work in the body
1. For strong bones
Vitamin D3 ensures calcium absorption, while K2 ensures it is incorporated into the bones. This keeps bone density stable long-term and reduces the risk of osteoporosis.
2. For a healthy cardiovascular system
Vitamin K2 prevents arterial calcification, while D3 contributes to blood pressure regulation. Together they promote vessel elasticity and heart health.
3. For a strong immune system
Vitamin D3 strengthens the immune system, K2 supports anti-inflammatory processes – together they ensure a balanced immune response.
4. For more energy and performance
D3 supports muscle strength, K2 has a positive effect on heart performance – ideal for everyday life, sports, and recovery.
Our Quality Promise
At Nutrador®, quality comes first:
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Tested purity: Each batch is lab-tested to ensure efficacy and safety. 
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Sustainable packaging: Filled in MIRON violet glass, which protects the sensitive ingredients and preserves freshness. 
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High-quality raw materials: Use exclusively bioactive forms (K2 MK-7, D3 Cholecalciferol) from certified sources. 
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Transparent production: Manufactured according to the highest German standards – without unnecessary additives. 
Usage and dosage
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Dosage: 1–2 drops daily with sufficient liquid. 
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Intake: Best taken with a meal to optimize the absorption of fat-soluble vitamins. 
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Check: Have your vitamin D levels checked regularly to adjust your dosage individually. 
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Storage: Store in a cool, dry, and dark place – ideally in the refrigerator. 
Instructions for use and safety
To use our K2D3 drops optimally and safely, please follow the recommendations below:
Side effects
At the recommended dosage, side effects are very rare. In individual cases, there may be personal reactions. If you notice intolerances or unusual symptoms, please discontinue use and consult a medical professional.
Safety instructions
If you have pre-existing health conditions – for example, soft tissue implants – please consult your doctor before taking this. Also, during pregnancy and breastfeeding, use should only be after medical consultation.
Interactions
If you are taking medications simultaneously, especially those that affect Vitamin D or Vitamin K metabolism, or if you have chronic illnesses, please consult a healthcare professional beforehand.
Dietary supplement, not a substitute for nutrition
Our K2D3 drops are a dietary supplement and do not replace a balanced, varied diet. A healthy lifestyle remains the foundation for your well-being.
Storage
Store the drops in a cool, dry, and light-protected place – ideally in the refrigerator. Please keep out of reach of children.
Overdose
Stick to the recommended dosage. Excessive intake of Vitamin D or K can have undesirable health effects. In case of accidental overdose, please seek medical advice.
Studies on Vitamins K2 and D3 
Scientific studies demonstrate the health benefits of Vitamin K2 and D3, especially regarding bone health and cardiovascular functions. Here are some of the key findings:
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Bone health: A study showed that Vitamin K2 plays a crucial role in regulating calcium metabolism by ensuring that calcium is incorporated into the bones rather than deposited in the arteries. This reduces the risk of osteoporosis and improves bone quality (Link to the study).
 
 Cardiovascular health: Vitamin K2 helps keep blood vessels elastic by preventing calcification. Combined with Vitamin D3, which regulates blood pressure, it contributes to overall heart health and reduces the risk of arterial calcification (Link to the study).
 
 Immune function: Studies have shown that Vitamin D3 strengthens the immune defenses, while Vitamin K2 has anti-inflammatory effects. This combination supports the immune system and reduces chronic inflammation, leading to better overall well-being (Link to the study).
 
These scientific findings emphasize the importance of combining Vitamin K2 and D3 for health and confirm the effectiveness of our K2D3 drops. The synergistic effect of these vitamins provides a solid foundation for supporting bone health, cardiovascular functions, and the immune system.