Osteo Defend

(Formerly Bonebuilder K2)
Support for healthy bones*
90 non-GMO Capsules

To purchase: Please email customerservice@mdlogichealth.com

Osteo Defend

Our bones form the structure of our entire body, and protect our internal organs from external damage. They also perform important cellular functions, such as blood cell formation. As we age, our bones need support to help us live healthy, active lifestyles. Our Osteo Defend provides the concentrated nutritional support to help maintain optimal bone health using six carefully researched ingredients selected for their specific bone-supporting properties.

Benefits of adding Osteo Defend to your diet

May help support strong healthy bones

May help with Vitamin D and Calcium absorption

May be ideal for those with osteopenia, osteoarthritis, or high risk of fracture

What makes our Osteo Defend different?

Osteo Defend supports healthy bone density with bone-derived microcrystalline hydroxyapatite, a highly absorbable compound found in bovine bone that provides calcium, phosphorus, and magnesium, along with collagen.

Similar in structure to humans' calcium, this mineral is required for strong bones and regular muscle function to blood clotting, cellular health, hormone activity, and a healthy heart rate.*

If blood levels of calcium are low due to poor diet, then calcium is reabsorbed from bones and used by the human body for maintenance. Replenishing our calcium levels every day is key to maintaining healthy calcium levels in our bones.

Osteo Defend formula features Vitamin K2, which ensures  proper absorption of calcium into the bones, avoiding calcification of blood vessels, Vitamin D which enhances absorption of calcium from food in the GI tract, and  Magnesium, a key bone health nutrient that is needed to convert vitamin D to its active form and is associated with higher bone mineral density.*

What's In It

Vitamin K

Both forms of vitamin K2, which promotes proper distribution of calcium for bone health and cardiovascular health*


Required for several hundred enzymatic reactions in the human body and is a common nutrient deficiency associated with osteoporosis. People with higher intakes of magnesium have higher bone mineral density, which is important for reducing the risk of bone fractures.*


400 mg of calcium from microcrystalline hydroxyapatite (derived from bovine bone)

Vitamin D3

2000 IU of vitamin D3


To strengthen bones and joints*

New Packaging

Packaged in eco-friendly amber glass bottles. This choice of packaging is not only environmentally sustainable but also helps protect the product from light and moisture, preserving its freshness and potency.

No Stearates

Formulated without any potentially problematic fillers, including stearates, palmitates, and rice. 

No Allergens

Contains no common allergens like wheat, soy, eggs, dairy, shellfish, rice, tree nuts, peanuts, and yeast.


We've lab-tested our ingredients for contaminants like pesticides, heavy metals, and mold to ensure you're getting the best.

Recommended Use

As a dietary supplement, take three (3) capsules daily, or as recommended by a healthcare professional.


Consult with a health care professional before use and/or if you are pregnant, lactating or undergoing treatment for a medical condition. Do not exceed recommended dosage. Discontinue use if any adverse reactions occur and contact a health care professional. Do not use if seal under cap is broken or missing. Store tightly closed in a cool, dry place. Keep out of reach of children.


*These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

Customer Reviews

Based on 7 reviews
Claire T. (Wilsonville, OR)

my sleep is better

Carolina M. (Los Angeles, CA)

Bonebuilder K2

Analise. (Rancho Cordova, CA)
I think these are working.

In September of ‘22 I fractured my spine, sacrum and pelvis in a bike accident. After the MRI in in the ER it was discovered I had osteopenia, I started Bone Builder soon after that. At the six month mark I had another MRI and all of the injuries had healed with very little residual pain. Eight months later I’m feeling great and have resumed 95% of the same activities I was performing prior to the accident. I turned 65 in January and I feel great, I’m sure I have another 65 years to go. Also my weak nails are now strong and I can actually grow them.

Amanda S. (Smithtown, NY)

Great supplement - hope it works!

Scott C.E. (Furlong, PA)
One pill for bones

D3 K2 and more! Love it Easy to take!