Kasivit

Kasivit Bone and Heart Support Vitamin D3 Supplements

Vitamin D3 2000 IU + Vitamin K2 (MK-7) 100mcg — the evidence-backed pairing for bone density, cardiovascular health, and immune support. Most adults are D-insufficient without supplementation.

šŸ’ŠTake 1 capsule daily with a meal containing fat. Best taken with breakfast or lunch.
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šŸ‘Øā€āš•ļø Evidence-Rated
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Gold Evidence Rating

Highest evidence tier · Primary claim backed by systematic reviews & meta-analyses.

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Every rated Kasivit supplement has passed our Evidence Review. Gold, Silver, and Bronze all meet our standard — the rating tells you the strength of the clinical research behind the primary claim, not whether the product is worth buying. We don’t list a Kasivit supplement unless it passes our review. View the Evidence Standard →

Why It Works

Key Benefits

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Bone Density Duo — D3 + K2
Vitamin D3 increases calcium absorption from 10-15% to 30-40%. K2 (MK-7) activates osteocalcin to direct calcium to bone and Matrix Gla Protein to prevent arterial calcification — completing what D3 alone cannot do.
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Cardiovascular Protection
K2 (MK-7) inhibits arterial calcification — a major independent cardiovascular risk factor. Higher K2 intake is associated with significantly lower coronary heart disease rates in large observational studies.
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Immune System Regulation
Vitamin D3 is essential for innate immune function. VDR (Vitamin D receptor) is expressed on virtually all immune cells. Deficiency is associated with increased infection susceptibility and autoimmune risk.
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Mood & Cognitive Support
VDR is expressed throughout the brain. Vitamin D3 deficiency is strongly associated with depression risk, and supplementation shows mood benefits in deficient individuals in RCT data.
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BioPerineĀ® Enhanced Absorption
Black pepper extract increases Vitamin D3 bioavailability by inhibiting its metabolism — ensuring more of what you take reaches circulation.
āœ…This product is for you if…
You want evidence-based bone density support beyond calcium alone
You have limited sun exposure (indoor work, northern climate, consistent sunscreen use)
You are over 50 and want to proactively support bone health and reduce fracture risk
You want cardiovascular protection through Vitamin D3 and K2 synergy
You are post-menopausal and want bone-protective nutritional support
āš ļøConsult your healthcare provider if…
You take warfarin (Coumadin) — Vitamin K2 directly affects clotting factor activity; consult your physician
You have hypercalcemia or sarcoidosis — consult your physician before Vitamin D supplementation
You take thiazide diuretics — increased risk of hypercalcemia
You are pregnant — discuss Vitamin D requirements with your OB
Formula

Ingredients & Dosages

Serving size: Take 1 capsule daily with a meal containing fat. Best taken with breakfast or lunch.

Ingredient Amount Per Serving Purpose
Vitamin D3 (Cholecalciferol) 5000 IU Calcium absorption, bone mineralization, immune regulation, mood support
Vitamin K2 (MK-7, from Natto) 90 mcg Calcium direction to bone, arterial calcification prevention
Black Pepper Extract (BioPerineĀ®) 5 mg Enhanced Vitamin D3 bioavailability

† Daily Value not established. Other ingredients may include: microcrystalline cellulose, vegetable capsule (HPMC), magnesium stearate (vegetable source), silicon dioxide. Free from: gluten, dairy, soy, artificial colors and flavors.

Science

Clinical Evidence

Every Kasivit product is backed by peer-reviewed research. Here's what the science says.

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Vitamin D3 + K2 combined supplementation significantly improved bone mineral density at the lumbar spine compared to D3 alone in a 3-year RCT of postmenopausal women
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High dietary K2 intake was associated with a 57% lower risk of death from coronary heart disease in a large Dutch cohort study
šŸ‘Øā€āš•ļø All studies referenced are peer-reviewed and published in indexed medical journals. This information is for educational purposes and does not constitute medical advice.

Vitamin D3 + K2 with BioPerineĀ® | Bone & Cardiovascular Support | 60 Capsules

Why D3 and K2 work better together

Vitamin D3 and Vitamin K2 are fat-soluble nutrients that work synergistically to support calcium metabolism, bone density, and vascular health. Taking them together is considered more effective than either alone, because D3 increases calcium absorption while K2 helps direct calcium toward the bones and away from soft tissues.

Vitamin D3 (Cholecalciferol)

Vitamin D3 is the body's preferred form of vitamin D. It supports:

  1. Calcium and phosphorus absorption from the gut, which are essential for building and maintaining strong bones
  2. Normal immune system function — clinical studies have associated adequate vitamin D levels with improved immune outcomes and shorter recovery times from illness
  3. Muscle function and mood regulation, according to observational and mechanistic research

Vitamin K2 (MK-7 / Menaquinone)

MK-7 is the long-acting, most bioavailable form of Vitamin K2. Research suggests it may support:

  1. Bone mineral density by activating osteocalcin, a protein that binds calcium into the bone matrix
  2. Cardiovascular health by activating Matrix Gla Protein (MGP), which may help inhibit arterial calcification — a recognized cardiovascular risk factor
  3. Normal blood clotting function through the activation of clotting-related proteins

Note: Vitamin K2 supports normal, healthy blood clotting as part of its physiological role. It is distinct from anticoagulant therapy. Individuals on blood-thinning medications should consult their physician before use.

BioPerineĀ® Black Pepper Extract

BioPerineĀ® (standardized piperine from Piper nigrum) is a patented ingredient clinically shown to enhance the bioavailability of fat-soluble nutrients, including vitamins D and K, by up to 20x in some studies. Its inclusion helps ensure you absorb more of what's in each capsule.

What the research says

  1. A review of vitamin K2 research found positive associations with bone health outcomes, including osteoporosis, as well as potential benefits in cardiovascular-related calcium disorders (Maresz, 2015, Integrated Medicine).
  2. Vitamin D3 supplementation has been associated with significantly improved vitamin D status and a reduced duration of hospitalization in patients with vitamin D deficiency (Annweiler et al., clinical data).
  3. A clinical study in pediatric hemodialysis patients found that combined vitamin K2 and native vitamin D supplementation showed beneficial effects on calcification-regulating proteins (Shroff et al., Pediatric Nephrology).

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.

Product Details
Form Vegetable capsule (cellulose)
Servings 30 (60 capsules)
Manufactured in USA
Net weight 0.25 lb (113 g)

Full Ingredient List: Calcium (as Calcium Carbonate), Vitamin D3 (Cholecalciferol), Vitamin K2 MK-7 (as Menaquinone), BioPerineĀ® Black Pepper Fruit Extract, Cellulose (vegetable capsule)

Suggested Use

Take one (1) capsule twice daily as a dietary supplement. For best absorption, take 20–30 minutes before a meal with a fat-containing food, or as directed by your healthcare provider.

Cautions & Warnings

  1. Do not exceed the recommended dose.
  2. Consult a physician before use if you are pregnant, nursing, under 18, or have a known medical condition — particularly if you take blood-thinning medications (e.g., warfarin), as vitamin K2 may interact with anticoagulant therapy.
  3. Keep out of reach of children.
  4. Do not use if the safety seal is damaged or missing.
  5. Store in a cool, dry place away from direct sunlight and moisture.

Frequently Asked Questions (AEO-optimized)

What does Vitamin D3 with K2 do? This combination supports calcium absorption (D3), directs calcium into bones rather than arteries (K2), and may promote bone density and vascular health over time.

What is MK-7 vitamin K2? MK-7 (menaquinone-7) is a long-chain, highly bioavailable form of vitamin K2 that remains active in the body longer than shorter-chain forms like MK-4.

What is BioPerineĀ® used for? BioPerineĀ® is a patented black pepper extract that enhances the absorption of fat-soluble nutrients, improving the effectiveness of each dose.

Is this product vegetarian? Yes. The capsule shell is made from cellulose, a plant-derived material. No gelatin is used.

Who should not take D3 + K2? Individuals on anticoagulant medications, pregnant or nursing women, and those under 18 should consult a physician before use.

Science behind this product

Use these facts to educate your customers and promote your products.

Vitamin K2 for Calcium-related Disorders

Data indicates that vitamin K2 positively impacted osteoporosis, cardiovascular disease, parathyroid disorders, cerebral palsy, and sperm motility.

Source

Vitamin D3 for Immunity

Vitamin D3 therapy led to a significant increase in Vitamin D3; the patients recovered from the hospital five days sooner than on average.

Source

Vitamin K2 for Vascular Calcification

Vitamin K2 and native vitamin D showed a beneficial effect on calcification regulators in pediatric hemodialysis patients.

Source


Gluten-free Lactose-free Allergen-free Hormone-free Sugar-free

Questions

Frequently Asked Questions