Sports Research® Vitamin D3 + K2 with 10,000iu of Plant-Based D3 & 100mcg of Vitamin K2 as MK-7 | Non-GMO Verified & Vegan Certified 60ct

Clinical trials typically use 1,000-4,000 IU daily (25-100 mcg). Sports Research Vitamin D3 + K2 10,000 IU delivers 1 softgel per day (60-day supply), which we classify as Blend relative to that range.

See the "Also consider" section below for two alternatives. Choose based on form preference (Softgel vs alternatives), dose adequacy, and third-party testing.

Yes — Third-Party Tested. Third-party testing verifies ingredient identity and label accuracy.

Yes — Amazon Subscribe & Save is available for this product. Enrolling locks in a recurring delivery at a reduced per-unit price.

Vitamin K2 MK-7 has a clinically significant interaction with warfarin (Coumadin) and other vitamin K-antagonist anticoagulants — adding K2 supplementation can reduce anticoagulant effectiveness and destabilize INR control. Anyone on blood thinners must consult their physician before use. High-dose Vitamin D3 (10,000 IU) can also enhance calcium absorption, which may interact with thiazide diuretics and calcium supplements to raise the risk of hypercalcemia.

Long-term use of 10,000 IU D3 daily without blood monitoring can lead to hypervitaminosis D, with symptoms including nausea, weakness, frequent urination, and in severe cases, kidney damage from hypercalcemia. Sports Research recommends consulting a healthcare provider before long-term use at this dose. K2 at 100mcg/day has an excellent long-term safety record with no known adverse effects in non-anticoagulant users. Annual serum 25(OH)D and calcium checks are advisable during extended use.

The PlantGel softgel with MCT oil is generally well-tolerated digestively. A small percentage of users experience mild nausea or loose stools from MCT oil, particularly on an empty stomach — taking with food eliminates this for most users. High-dose D3 itself does not typically cause direct GI side effects at therapeutic doses in vitamin-D-deficient individuals. GI symptoms may signal early hypercalcemia if they emerge after weeks of consistent use.

This product pairs well with magnesium — magnesium is required as a cofactor for vitamin D conversion and activation, and many D3 users are also magnesium-insufficient. Avoid stacking with additional vitamin D or K2 supplements to prevent exceeding safe thresholds. Vitamin A (retinol) also works synergistically with D3 for bone and immune regulation. Do not combine with fish oil-based K2 supplements without calculating total K2 intake.

Take 1 softgel daily with or without food — the MCT oil in the softgel enhances absorption even without a fat-containing meal. Do not exceed 1 softgel daily without physician guidance. If taking for deficiency correction, retest serum 25(OH)D levels after 90 days to assess response and adjust dose accordingly. Anyone on anticoagulant therapy must have K2 use approved by their physician before starting.

Vitamin D serum levels rise measurably within 4–8 weeks of consistent 10,000 IU supplementation in deficient individuals. Bone-density and calcium metabolism benefits from D3+K2 are longer-term outcomes typically measurable at 6–12 months via DEXA scan or bone biomarker testing. Immune support effects from correcting deficiency are reported anecdotally within 2–4 weeks. K2's cardiovascular calcium-directing activity is also a longer-term process.