Bone maintenance
Vitamin D supports calcium absorption, while vitamin K contributes to normal bone metabolism. It complements dietary mineral nutrition rather than replacing it.*
Vitamin D3 + K2 – 90 capsules
4.7 (17)✓90-DAY MONEY-BACK GUARANTEE
$24.95$0.28 PER SERVING
Vitamin D3 and MK-7 vitamin K2 for bone, muscle and immune nutrition in one daily capsule.*
Tested by Light Labs inSEP 2026
12 substances tested for quality
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QUANTITY
1
MANUFACTURED IN USATHIRD-PARTY TESTEDcGMP FACILITYVEGAN CAPSULENON-GMOCOA PER LOTGLUTEN-FREE
Who it's for
Choose the amount and form that fit your nutritional needs.
- Adults selecting this higher-strength D3 amount with healthcare guidance.
- People looking for D3 and MK-7 K2 in one clearly stated serving.
How to take
Adults take 1 capsule daily with food, or as directed by a healthcare professional.
Ingredients
- Active ingredients: D3 and MK-7 K2. Together in one capsule.
Vitamin D3 + K2
How it supports you.
Calcium absorption
Vitamin D helps your intestine absorb calcium from the diet. That is one reason vitamin D belongs in a considered bone-nutrition routine.*
Muscle function
Vitamin D helps maintain normal muscle function. This helps maintain everyday movement and normal muscle activity.*
Immune function
Vitamin D participates in the normal activity of immune cells. It is an essential nutritional role that supports your body’s everyday defenses.*
Normal clotting
Vitamin K supports the normal activation of proteins used in blood clotting. It is a distinct nutritional role from vitamin D’s calcium-absorption function.*
Cellular activity
Vitamin D contributes to normal cell growth and differentiation. These functions are part of ordinary tissue maintenance.*
Inside the formula / Vitamin D3 + K2
Know the form.
Know the source.
Two clearly identified vitamin forms. 125 mcg (5,000 IU) D3 + 180 mcg K2 per capsule.
MENAQUINONE-7
K2Quest MK-7
K2Quest is the MK-7 form of vitamin K2. A clearly identified source of menaquinone-7, with its amount stated per capsule.
- Supplier
- NutriScience Innovations, LLC
- Manufacturing location
- United States
Human research
Human ingredient research
In a three-year placebo-controlled trial of 244 postmenopausal women, 180 mcg/day of vitamin K2 as MK-7 improved vitamin K status and helped maintain bone density at selected skeletal sites.
Knapen et al., 2013 / MenaQ7 trial
The CoreLabs standard
Quality you can
verify.
Named ingredient forms. Human research. Published testing.
| What to look for | CoreLabs | Brand 1 | Brand 2 | Brand 3 |
|---|---|---|---|---|
| Heavy-metal testing | ✓ | — | — | — |
| Microbiological testing | ✓ | ✓ | — | — |
| Independent laboratory testing | ✓ | — | — | — |
| Clinically researched ingredients | ✓ | — | — | — |
| Dose disclosed | ✓ | ✓ | ✓ | ✓ |
| No proprietary blend | ✓ | — | ✓ | — |
✓ Verified · — Not verified
OUR QUALITY STANDARD
Tested like it’s going into our own body. Because it is.
Quality is personal. Our standard centers on heavy-metal and microbiological testing, clear specifications, and documented results.
CAREFUL TESTING. CLEAR DOCUMENTATION.
Reviews.
CUSTOMER REVIEWS
4.7 /5 ★
Based on 17 reviews
★★★★★
Patricia V.
✓ Verified customer
- Age
- 45-55
- Gender
- Female
- Taking it for
- 7-8 weeks
- Consistency
- Most days
Oct 2026
So far, seeing a real lot-specific COA matters more to me than a generic 'third-party tested' claim. The formula is simple enough that I know exactly what I am taking. It feels like a solid product, not something built around hype.
Was this helpful?
★★★★★
Rachel D.
✓ Verified customer
- Age
- 65+
- Gender
- Female
- Taking it for
- 7-8 weeks
- Consistency
- Every day
Oct 2026
After 7-8 weeks, seeing a real lot-specific COA matters more to me than a generic 'third-party tested' claim. What sold me was being able to see the third-party testing instead of just a generic 'tested' badge. It feels like a solid product, not something built around hype.
Was this helpful?
★★★★★
Adam F.
✓ Verified customer
- Age
- 35-45
- Gender
- Male
- Taking it for
- 3-4 weeks
- Consistency
- Every day
Oct 2026
I switched to this after trying another brand. The exact D3 and K2 amounts are easy to find and the label does not make me guess. I like that Corelabs publishes the batch testing and actually shows potency, heavy metals and microbials. For me this has been an easy one to stick with.
Was this helpful?
★★★★★
Nathan C.
✓ Verified customer
- Age
- 25-30
- Gender
- Male
- Taking it for
- 7-8 weeks
- Consistency
- Every day
Oct 2026
After 7-8 weeks, i added it because I spend much less time outside in the colder months. The formula is simple enough that I know exactly what I am taking. Good product, just not an overnight difference for me.
Was this helpful?
★★★★★
Henry T.
✓ Verified customer
- Age
- 55-65
- Gender
- Male
- Taking it for
- 3-4 weeks
- Consistency
- Every day
Oct 2026
After 3-4 weeks, i like getting D3 and K2 together instead of keeping two separate bottles. What sold me was being able to see the third-party testing instead of just a generic 'tested' badge. I like that the K2 form and amount are printed right next to the D3 instead of being an afterthought. I would buy this one again.
Was this helpful?
★★★★★
Megan D.
✓ Verified customer
- Age
- 35-45
- Gender
- Female
- Taking it for
- 5-6 weeks
- Consistency
- Most days
Oct 2026
I have been using this for 5-6 weeks and the exact D3 and K2 amounts are easy to find and the label does not make me guess. The lot-specific lab verification is a big reason I chose this over another brand. So far I am happy with the switch.
Was this helpful?
Frequently asked questions
What does each serving provide?
The labeled 1 capsule serving provides 125 mcg (5,000 IU) vitamin D3 and 180 mcg vitamin K2 as MK-7.
What makes this form different?
Vitamin D3 supports calcium absorption, while vitamin K2 contributes to proteins involved in normal bone metabolism and blood clotting.
Who is this formula for?
Adults selecting this higher-strength D3 amount with healthcare guidance. People looking for D3 and MK-7 K2 in one clearly stated serving.
How should I take it?
Adults take 1 capsule daily with food, or as directed by a healthcare professional.
How many servings are in a bottle?
The bottle contains 90 capsules and 90 servings. Follow the directions when deciding how long a bottle will last.
Can I combine it with my other supplements?
This higher-strength D3 serving should fit your healthcare professional’s guidance. If you take warfarin or another anticoagulant, discuss vitamin K use before starting.
When should I expect a difference?
People’s nutritional needs and responses vary. Use consistently as directed; this formula does not promise a particular result or timeline.
What independent testing can I review?
Our standards don’t stop at manufacturing. Every finished batch undergoes independent third-party testing for potency, heavy metals and microbiological quality. We make certificates of analysis available for review because you deserve documented results—not just promises.
Consult a healthcare professional before use if you are pregnant, nursing, taking medication, or have a medical condition. Do not use without medical supervision if you are taking warfarin or other anticoagulant medication. Keep out of reach of children.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
K2Quest® is a registered trademark of NutriScience Innovations, LLC. Nu-FILL™, Nu-FLOW®, and Nu-MAG® are trademarks of RIBUS, Inc. All trademarks are property of their respective owners.