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A strong dose of D3 and K2 in top quality
The most concentrated vitamin D3 & K2 with 4000 IU of vitamin D3 and 150 µg of vitamin K2 in each capsule. Thanks to this formula, just one capsule a day is enough, so the pack will last for 100 days. We use premium ingredients, including the patented and scientifically proven vitamin K2 K2VITAL DELTA from Norway, where quality is a matter of course. Both vitamins contribute to the maintenance of normal bones, and vitamin D also contributes to the normal function of the immune system.

We had 2 out of 2 active substances verified by an independent accredited laboratory. What we state on the label is what you will actually find in the capsule. We guarantee the quantity of active ingredients.


Vitamin D3 (cholecalciferol) and vitamin K2 (menaquinone-7) are micronutrients that often appear together in food supplements. Each has a different role in the body, and their combination is based on the natural logic of calcium metabolism. Vitamin D contributes to the normal absorption of calcium, while vitamin K contributes to the maintenance of normal bones. This is why these two vitamins are commonly combined into a single formulation.
“In our geographical location, it is advisable to pay attention to vitamin D intake, especially outside the summer months. In such cases, it may be appropriate to consider supplementing it, ideally in a form that corresponds to the natural form of vitamin D in the human body.”
MUDr. Tomáš Kaštovský
- General practitioner, populariser of medicine and author of educational health content on social networks.



According to extensive international observational studies published in the scientific literature, vitamin D levels in the population are influenced by a number of factors, particularly the degree of sun exposure. Differences are more often recorded in the colder seasons of the year, in people with limited sun exposure, or in people who spend most of their time indoors. This is why vitamin D3 is often mentioned in the context of modern lifestyles and seasonal changes in solar intensity. This context explains why vitamin D3 is one of the most discussed micronutrients today.
BrainMax Vitamin D3 & K2 is tested in an independent accredited laboratory that performs a thorough analysis to verify its safety, purity, and compliance with the legislative limits for food supplements. What is checked?


BrainMax food supplements have passed rigorous testing in the DSHS Cologne laboratory, accredited by the administrator of the Cologne List, one of the leading international certification programmes for sports nutrition, respected by anti-doping organisations worldwide. This means the product meets the highest possible standards of purity and safety. We have invested in tests that are considered the gold standard in the world of sports nutrition to give you the assurance that purity is proven, not just promised.
This patented form of vitamin K2 in the form of MK7 all-trans is much more stable than other forms of vitamin K2. It is characterised by high usability and bioavailability. Compared to common forms of vitamin K2, which have a half-life of 1.5 hours in the body, this form of vitamin K2 remains in the body for 72 hours. This means an up to 48× longer half-life.


K2VITAL DELTA MK-7 is a form of vitamin K2 characterised by its stability not only under normal storage conditions but also at elevated temperatures of up to 40°C. The graphs from a published study show the changes in the stability of this form over several months. The measured values show that K2VITAL DELTA MK-7 maintains the declared vitamin content.


Kappa also conducted a survey on the quality, stability, and effectiveness of vitamin K2 in food supplements in non-mineral combinations, where stability should not be an issue. Half of these non-mineral vitamin K2 products had quality issues, with a full third of the sample showing no measurable vitamin K2 content. In a fifth of the products, the vitamin K2 content was measured at 26–75% of the amount declared on the label. Only in a quarter of the products did the measured amount of vitamin K2 correspond to the amount on the label.
1 capsule daily, after a meal. Take with 200ml of liquid.
| Active ingredients in 1 capsule | Amount | %NRV* |
|---|---|---|
| Vitamin D3 (as cholecalciferol, from lanolin) | 100 µg (4000 IU) | 2000% |
| Vitamin K2 (as menaquinone-7 - all-trans MK-7, K2VITAL DELTA) | 150 µg | 200% |
| Organic turmeric | 435 mg | ** |
* % Nutrient Reference Value
** Nutrient Reference Value not established
Organic turmeric (Curcuma longa) root powder, capsule: hydroxypropylmethylcellulose (HPMC), vitamin K2 K2VITAL DELTA (menaquinone-7 from geranium), vitamin D3 (cholecalciferol from lanolin).
Contains no fillers or stabilisers, only the declared ingredients in their purest form. Plant-based capsules made from hydroxypropylcellulose.
Warning:
Do not exceed the recommended daily dosage. A food supplement is not a substitute for a varied and balanced diet and a healthy lifestyle. Keep out of the reach of children. Not suitable for children under 15 years of age. Pregnant and breastfeeding women should consult a doctor before use.
Storage
Store in a well-sealed container, in a dry and dark place at a temperature of up to 25°C.
BRAINMARKET s.r.o., Hladnovská. 83/93, Ostrava 702 00, Czech Republic, [email protected]
Specifications can be changed without notice. Images are for illustrative purposes only.