Vitamin D3 + K2 Supplements
Vitamin D3 + K2 supplements combine cholecalciferol (D3) with vitamin K2, most commonly in the MK-7 (menaquinone-7) form. These combination formulas are used by people who want to take both nutrients together rather than as separate supplements. This collection includes D3+K2 products from established brands including Thorne, Pure Encapsulations, NOW Foods, Bluebonnet Nutrition, and Designs for Health.
If you are looking for a pure D3 product without K2, see our Vitamin D3 Supplements collection. For the full range of vitamin D products, visit the Vitamin D Supplements hub.
Products in this collection are available primarily as capsules and softgels. Potencies vary by product — D3 content typically ranges from 1,000 IU to 5,000 IU per serving, while K2 content (as MK-7) typically ranges from 45 mcg to 200 mcg per serving.
Shop D3 + K2 by Brand
Related Collections
Frequently Asked Questions
Why are D3 and K2 combined in the same supplement?
Some research suggests that vitamins D3 and K2 work together in calcium metabolism pathways. Vitamin D3 increases calcium absorption, while vitamin K2 (as MK-7) is associated with directing calcium toward bones and teeth rather than soft tissues. Combination products are a convenient option for people who have been advised to take both nutrients.
What form of K2 is used in these products?
Most D3+K2 products in this collection use MK-7 (menaquinone-7), which is the longer-chain form of K2. MK-7 has a longer half-life in the body compared to MK-4 and is the form most commonly found in combination D3+K2 supplements. Check the supplement facts panel of each product for the specific form and amount.
Is there a reason to choose a combination product over two separate supplements?
A combination product is a matter of convenience and may reduce the number of capsules you take daily. If your healthcare provider has recommended specific dosages of D3 and K2 separately, individual supplements give you more flexibility in dosing each nutrient independently.
Who should avoid vitamin K2 supplements?
People taking warfarin (Coumadin) or other anticoagulant medications should consult their healthcare provider before taking vitamin K2, as K2 can interact with anticoagulant therapy. This is a clinical question — always discuss with your prescribing provider before adding K2 to your routine.