Sports Research Vitamin D3 5000 IU with Coconut MCT Oil - Extra Strength Vitamin D Supplement - Non-GMO Verified, Gluten & Soy Free – 125mcg, 30 Liquid Softgels

Clinical trials typically use 1,000-4,000 IU daily (25-100 mcg). Sports Research Vitamin D3 5000 IU with Coconut MCT Oil delivers 5000 IU (125 mcg) per softgel with cold-pressed virgin coconut oil, which we classify as Full 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 — Yes — Non-GMO Verified, cGMP-compliant, third-party tested for quality and potency. 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 D3 can interact with thiazide diuretics (increasing hypercalcemia risk) and some anticonvulsants that accelerate D metabolism. If you take corticosteroids, orlistat, or cholestyramine, these can reduce D3 absorption. Always consult your doctor before starting 5000 IU daily, especially if you are on any chronic medication.

At 5000 IU daily, long-term use is generally safe in D-deficient individuals but warrants periodic serum 25(OH)D monitoring. Toxicity (hypercalcemia) from D3 alone is rare below 10,000 IU/day in healthy adults but becomes a real concern if combined with calcium supplementation or extended over many months without bloodwork.

Most users tolerate this softgel very well — the coconut oil base is gentle on the stomach and may even aid absorption. At high doses, nausea, constipation, or loss of appetite can signal hypercalcemia; these symptoms warrant stopping the supplement and testing serum calcium and 25(OH)D levels.

Yes — D3 pairs well with magnesium (which activates D), vitamin K2 (to direct calcium to bones rather than arteries), and omega-3s. Avoid stacking with other high-dose D3 products or fortified calcium supplements without tracking total daily intake against the 4000 IU tolerable upper limit set for unsupervised use.

Take one softgel daily with a meal containing fat — though the coconut oil in the softgel itself supports absorption even without a fatty meal. Store in a cool, dry place. Get baseline and follow-up 25(OH)D levels tested at least annually when maintaining 5000 IU/day long-term.

Serum 25(OH)D levels typically rise measurably within 2–4 weeks of consistent supplementation at 5000 IU. Functional benefits — improved mood, energy, immune resilience — reported by users often emerge at 4–8 weeks. Bone density outcomes require months to years of sustained adequate levels.