✦ AI Overview
NBI Osteo-K is a clinically studied, three-nutrient bone support formula built around the 45mg Vitamin K2 MK4 dose shown in research to maintain strong bones. By pairing MK4 with 2000 IU Vitamin D and 1000mg highly absorbable calcium citrate, Osteo-K addresses the full bone-building pathway — ensuring calcium is absorbed, directed to the bone matrix, and properly incorporated — supporting skeletal strength, density, and mobility as you age. 180 veggie capsules, manufactured in the USA.
🧬 45mg Vitamin K2 MK4
☀️ 2000 IU Vitamin D
🦴 Calcium Citrate
90-Day Supply
🇺🇸 Made in USA
🌍 Worldwide Delivery in 5–10 Days✅ Duties & Taxes PrepaidNo extra charges at delivery — what you pay at checkout is all you pay.
🏷️ Volume DiscountBuy 2 or more & save 5%Discount applied automatically at checkout.
Dietary & Allergen Info
Non-GMO
Vegetarian
Veggie Capsules
Made in USA
No Artificial Additives
Key Features
-
Clinically Studied K2 MK4 Dose — 45mg Vitamin K2 as MK4 per day — the naturally occurring form and the dose used in clinical research to support bone health and maintain bone mass.*
-
Highly Absorbable Calcium Citrate — 1000mg calcium per day as calcium citrate, which absorbs without requiring stomach acid — superior bioavailability vs. calcium carbonate.*
-
2000 IU Vitamin D — Supports calcium absorption and immune function. Works synergistically with K2 to direct calcium to bones rather than soft tissues.*
-
Supports Bone Matrix & Bone Mass — The K2-D-Calcium triad activates osteocalcin, the protein that binds calcium into the bone matrix, promoting healthy bone density and structural integrity.*
-
Supports Active Lifestyle & Mobility — Strong bones support participation in the activities you love as you age. Highly absorbable formula designed for long-term skeletal health.*
-
180 Veggie Capsules — 90-Day Supply — Manufactured in the USA. Backed by clinical research. Consult your healthcare provider before use.
Bone health is not simply a matter of calcium intake. Calcium absorbed from diet or supplements must be properly directed to the bone matrix — a process that depends critically on adequate Vitamin K2 and Vitamin D. Without K2, calcium may accumulate in soft tissues rather than bones. Without Vitamin D, calcium absorption from the gut is severely limited. NBI Osteo-K addresses all three pillars of the bone-building pathway in a single, highly absorbable formula.
The 45mg Vitamin K2 MK4 dose in Osteo-K is the clinically studied amount shown to support bone health — significantly higher than the microgram-level doses found in most multivitamins and general bone formulas. Combined with 2000 IU Vitamin D and 1000mg calcium citrate, Osteo-K provides comprehensive, research-backed support for bone matrix formation, bone mass maintenance, and long-term skeletal function.
Developed by NBI
NBI (Nutritional Biochemistry Incorporated) is committed to developing quality supplements backed by clinical research, manufactured in the USA to rigorous quality standards. Their formulas are designed for individuals who want science-driven nutritional support for long-term health and active aging.
Technical Specifications
| Product Type |
Bone Support Supplement |
| Count |
180 Veggie Capsules |
| Supply Duration |
90-Day Supply |
| Vitamin K2 (per day) |
45mg as MK4 (naturally occurring form) |
| Vitamin D (per day) |
2000 IU |
| Calcium (per day) |
1000mg as Calcium Citrate |
| Capsule Type |
Veggie Capsules |
| Price Per Day |
$0.73/day |
| Manufacturing |
Made in USA |
| Package Dimensions |
5.8 x 3.0 x 3.0 inches |
| Barcode (UPC) |
718122855520 |
| Brand |
NBI |
📊 Dosage & Usage Guide
Follow label directions or your healthcare practitioner’s guidance. Consult your healthcare provider before use, especially if you are on blood-thinning medications (Vitamin K2 may interact with warfarin).
| Parameter |
Recommendation |
Notes |
| Daily Serving |
As directed on label |
Delivers 1000mg calcium, 2000 IU Vitamin D, and 45mg K2 MK4 per day. |
| Timing |
With or without food |
Calcium citrate absorbs well with or without food, unlike calcium carbonate. |
| Duration |
Long-term daily use |
Bone support benefits are cumulative. Consistent daily use is recommended for best results. |
| Caution |
Consult your healthcare provider |
Especially important if taking warfarin or other anticoagulants, as Vitamin K2 may affect clotting. |
*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.
Frequently Asked Questions
What is NBI Osteo-K?
NBI Osteo-K is a clinically studied bone support supplement combining 45mg Vitamin K2 (as MK4), 2000 IU Vitamin D, and 1000mg calcium (as calcium citrate) per day. It is formulated to promote healthy bone matrix, bone mass, and long-term skeletal function as you age.
What is Vitamin K2 MK4 and why is it important for bone health?
Vitamin K2 (as MK4) is a naturally occurring form of Vitamin K that activates osteocalcin, the protein responsible for binding calcium into the bone matrix. Without adequate K2, calcium absorbed from diet or supplements may not be properly directed to bones. The 45mg MK4 dose in Osteo-K is the clinically studied amount shown to support bone health.
Why is calcium citrate used instead of calcium carbonate?
Calcium citrate is more bioavailable than calcium carbonate and does not require stomach acid for absorption, making it suitable for individuals with low stomach acid, those taking acid-reducing medications, or anyone who prefers to take supplements without food.
How many capsules do I take per day?
The daily serving delivers 1000mg calcium, 2000 IU Vitamin D, and 45mg Vitamin K2 MK4. The 180-count bottle provides a 90-day supply at the recommended daily dose. Follow the label directions or your healthcare practitioner’s guidance.
Is Osteo-K suitable for vegetarians?
Yes. NBI Osteo-K is encapsulated in veggie capsules, making it suitable for vegetarians.
Where is NBI Osteo-K manufactured?
NBI Osteo-K is manufactured in the USA. NBI is committed to quality supplements backed by clinical research.
Can I take Osteo-K with other supplements?
NBI Osteo-K is designed as a comprehensive bone support formula. Consult your healthcare practitioner before combining with other calcium, vitamin D, or vitamin K supplements to avoid exceeding recommended daily intakes. If you take warfarin or other anticoagulants, consult your doctor before use.
