OstroVit’s Vitamin D3 4000 + K2 combines two fat-soluble vitamins in a single, easy-to-swallow tablet. Each tablet delivers 4,000 IU of cholecalciferol (vitamin D3) alongside 100 µg of menaquinone-7 (K2 in its MK-7 form), with the pack containing 100 tablets in total. The MK-7 form of vitamin K2 is widely regarded as one of the more readily absorbed variants available.
Vitamin D3 is a naturally occurring compound found in oily fish and produced by the skin in response to sunlight, while vitamin K2 can be sourced from both plant and animal foods as well as via synthesis in the digestive tract. Bringing them together in one tablet makes it straightforward to top up daily intake of both nutrients without juggling separate products.
This tablet format suits those following a structured nutrition plan who prefer a simple, unflavoured micronutrient supplement — whether that’s athletes training indoors, office workers with limited sun exposure, or anyone looking to round out their diet with these two complementary vitamins.





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