Why buy vitamin D3-K2 capsules?
Many people take vitamin D3 in isolation and overlook a crucial problem: D3 activates calcium absorption in the gut, but it does not control where the calcium goes in the body.¹ Without K2, calcium is deposited in arteries and soft tissue instead of in the bones. Doctors call this the calcium paradox: your bones stay weak while your blood vessels harden.¹ ¹¹
Vitamin K2 takes control: it transports calcium specifically into the bones and at the same time keeps it out of the arteries.¹⁰ It is this synergy that makes taking it safe and effective.¹ ³ Both vitamins work like a team: D3 supplies the raw material, K2 directs it to the right place.
If you want to build up your performance in the long term, you need both. Individual supplements only do half the job.
What makes the vitamin D supply from GN Laboratories so special?
Most D3 and K2 products rely on powder capsules with average bioavailability. GN Laboratories takes a different approach: liquid D3 in MCT oil combined with the branded raw material K2Vital® ensures that your body can utilize every microgram. No compromises in absorption, no losses due to inferior formulations.
The figures speak for themselves: studies show that fat-soluble vitamins in oil-based form are absorbed up to 300% better than in powder form*.
K2Vital® provides the most stable form of menaquinone-7 on the market, with 99.7 % all-trans structure.¹ ¹⁰
This means that each capsule works as it should, without degradation by light or heat.
You don't get a generic blend, you get a thoughtful formulation with scientifically validated raw materials. Developed for people who expect results.
MCT oil for maximum absorption
Vitamin D3 is fat soluble and needs fat to be absorbed by the body. Many powder capsules rely on you eating something fatty at the same time. GN Laboratories solves this differently: MCT oil from coconut serves as a natural carrier medium and ensures that absorption works independently of your meal.
Scientifically confirmed: Liquid formulations with MCT oil achieve up to 300% higher bioavailability than dry powders.* Your body can directly utilize the sun vitamin without relying on timing or fat intake. One capsule, full effect.
K2Vital® for tested stability
Not every form of K2 is equally effective. Many cheap products contain synthetic forms that lose their activity when exposed to light and heat. K2Vital® relies on menaquinone-7 in the biologically active all-trans form: 99.7 % purity, clinically tested and patented.¹ ¹⁰
The all-trans value determines the effect. Only this structure can be fully utilized by your body. K2Vital® remains stable even after months and constantly delivers the full dose. This is confirmed by independent laboratory tests and makes this active ingredient the first choice for serious supplementation.
Each of the 90 capsules contains 200 µg of vitamin K2 in this premium form. No compromises, no degradation products.
How do D3 and K2 work together?
Both vitamins control calcium metabolism, but at different levels. D3 activates absorption in the intestine, K2 coordinates distribution in the body.¹ ³ This division of labor makes the combination more efficient than individual supplements: more calcium reaches the bones, less ends up in tissues where it causes damage.¹ ¹⁰ ¹¹
The effect unfolds over weeks: Your body builds up stores, stabilizes the supply and optimizes processes such as muscle function and immune defense.⁴ ⁵ ⁶ Especially in months with little sunlight, the difference between sufficient and insufficient supply becomes apparent.⁷
Regular supplementation lays the foundation for long-term stability, not just in winter.
Immune function, bones and muscles
The sun vitamin supports the normal function of the immune system⁵ ⁶ and contributes to the maintenance of normal bones.² ³ Menaquinone activates proteins that specifically incorporate calcium into the bone structure.¹ ¹⁰ Both nutrients promote muscle function and regeneration after intensive sessions.⁴
Quality made in Germany
GN Laboratories produces in Germany according to strict quality standards. Each batch is independently laboratory tested to guarantee purity, dosage and stability. Production is carried out according to GMP and IFS standards. No compromises on raw materials, no compromises on control.
You get a dietary supplement that delivers what it promises. No fillers, no unnecessary additives, no ambiguities on the label. Transparency and traceability are part of our product philosophy.
