Strom Sports Vitamin D3 & K2 90 Caps

5000IU Vitamin D3 as Cholecalciferol — Optimal Serum D3 Levels — At 2,500% NRV, this high-strength dose is designed to raise and maintain serum 25(OH)D in the range associated with optimal health outcomes — not just prevent severe deficiency. D3 (cholecalciferol) is the natural, more bioavailable form that raises blood levels significantly more effectively than D2 (ergocalciferol).

125µg Vitamin K2 as MK-7 — The Longest-Acting K2 Form — MK-7 has a biological half-life of approximately 72 hours — meaning a single daily dose maintains elevated K2 levels throughout the day and beyond. MK-4 by contrast is cleared within 1–2 hours. A single daily MK-7 capsule achieves what multiple daily MK-4 doses cannot.

D3 Initiates the Calcium Cycle — K2 Completes It — D3 drives calcium absorption. Without K2 to activate Osteocalcin and Matrix Gla-Protein, calcium accumulates in arteries and soft tissue rather than reaching bone. K2 directs calcium to bone, protects arteries and makes high-dose D3 supplementation both safer and more effective.

Bone Health — EU-Authorised Health Claims — Both Vitamin D and Vitamin K contribute to the maintenance of normal bones — two independently substantiated EU health claims covering the same system from complementary biological angles.

Immune System Support — Vitamin D receptors are present on virtually every immune cell type. Research consistently associates optimal D3 status with improved innate and adaptive immune responses and reduced susceptibility to respiratory infections.

Muscle Function & Performance — D3 receptors are found in muscle tissue. Research associates vitamin D deficiency with reduced strength, impaired neuromuscular function and increased injury risk — with meaningful performance differences observed between deficient and replete athletes.

Cardiovascular Protection — Matrix Gla-Protein (MGP) activated by K2 MK-7 is the body's most potent inhibitor of arterial calcification — a key driver of cardiovascular disease. Clinical research associates higher K2 intake with significantly reduced arterial calcification and lower cardiovascular mortality.

Vegan & Vegetarian Suitable — 90-Day Supply — HPMC capsule, no animal-derived ingredients, and a full three-month supply at one capsule per day at outstanding value.