A higher dose is not automatically the better fit. This comparison separates the amount of D3 from the form of K2, then looks at added ingredients such as calcium and black pepper extract, and the way each product is taken.
Read micrograms and IU per serving. Compare that total with any vitamin D already in your routine.
MK-4 and MK-7 are different forms. Record which one a product uses rather than treating every K2 label as identical.
Added calcium or black pepper extract changes the formula. Decide whether those additions belong in your routine.
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Option 2
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Option 3
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Option 4
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Option 5
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| Criteria | CuraMyHealth Vitamin K2/D3+ | Sports Research D3 + K2 | Thorne Vitamin D3 | NatureWise Vitamin D3 | Nature Made Vitamin D3 |
| Criteria Met | 4 of 4 | 2 of 4 | 1 of 4 | 1 of 4 | 0 of 4 |
| Dose per serving | 5,000 IU (125 mcg) D3 + 100 mcg K2 / capsule | 5,000 IU (125 mcg) D3 + 100 mcg K2 (MK-7) / softgel | 5,000 IU (125 mcg) vitamin D3 / capsule | 5,000 IU vitamin D3 / softgel | 2,000 IU vitamin D3 / softgel |
| Verified purity (COA) | ✓ | ? | ? | ? | ? |
| Single Ingredient | ✕ | ✕ | ✓ | ✓ | ✓ |
| Manufactured in the USA | ✓ | ✓ | ✓ | ✓ | ✓ |
| 3rd Party Tested | ✓ | ✓ | ✓ | ✓ | ✓ |
| Score | 9.5 | 8.9 | 8.5 | 8.2 | 8.0 |
Amounts are label reference servings, not personal dosing advice. Products and directions can change; check the current package and total daily intake.
A combined capsule for adults who want D3, MK-7 K2 and calcium in the same formula. The supplier lists bone and immune support among its approved uses.*
One capsule gives 125 mcg (5,000 IU) of D3, above the 100 mcg (4,000 IU) adult daily upper limit set by the NIH Office of Dietary Supplements. If you already take vitamin D, or are not sure how much is right for you, check with your healthcare provider before use. It is not labeled vegan.
Other formulas to consider
No. The NIH Office of Dietary Supplements sets the adult upper limit at 4,000 IU (100 mcg) a day from all sources. One capsule of Vitamin K2/D3+ gives 5,000 IU, so check with your healthcare provider before use, especially if you already take vitamin D.
Vitamin K can affect medicines such as warfarin. Ask the clinician managing your medication before starting or changing a K-containing supplement.
We compared manufacturer labels, formats and ingredient differences. This is a product-information comparison, not a laboratory test or a trial showing one product works best.
Compare the ingredients, the serving and the fit with your routine. Use current product information before you decide.
We reviewed manufacturer-published ingredient information, formats and serving references in October 2026. Product names identify the versions compared. We did not test these products in a laboratory or compare clinical results between them. The order presents our affiliated featured formula followed by alternatives; it is not an effectiveness ranking.
Prices and offers change, so product links show current information. These supplements are not intended to diagnose, treat, cure or prevent disease. Ingredient information is not personal medical advice.
*Support statements have not been evaluated by the Food and Drug Administration. Individual results vary.