Our calcium is 100% plant-based and derived from marine red algae (Lithothamnion species). Unlike rock-based calcium, this form is naturally bioavailable and easier for your body to absorb and use.

⦁ OsteOrganiCAL^® Plus includes calcium, magnesium, 72 trace minerals, Vitamin D3, and Vitamin K2 — for comprehensive support.
 ⦁ OsteOrganiCAL^® + D3 is the same formula without Vitamin K2 — ideal for people on blood thinners.
⦁ Both formulas are built on our unique seaweed-based calcium.

Seaweed naturally absorbs trace minerals from ocean water. Its unique honeycomb structure allows your body to absorb up to 95% of the nutrients — unlike rock-based sources that often go unused or cause buildup in kidneys and arteries.

Yes, the Plus formula includes Vitamin K to help direct calcium into bones (not soft tissue). Our +D3 formula does not contain Vitamin K — perfect for those with restrictions.

Our algae-derived calcium already contains naturally occurring trace minerals that work synergistically to support absorption. Because of the bioavailability of our source, additional boron is not needed — and some individuals are sensitive to high boron levels.

OsteOrganiCAL^® includes calcium, magnesium, manganese, Vitamin D3, Vitamin K2 (in the Plus formula), and 72 trace marine minerals such as selenium, copper, phosphorus, iodine, and more.

Yes — we recommend OsteOrganiCAL^® + D3, which is formulated without Vitamin K2 to avoid interactions with anticoagulants. As always, consult with your healthcare provider before starting any new supplement.

Yes. Our marine-based calcium is highly bioavailable and better absorbed than rock-based alternatives, which is especially important after gastric bypass surgery. Always consult your doctor regarding your specific needs.

Most of our customers report no interactions, but you should always consult your healthcare provider when introducing a new supplement — especially if you take prescription medications or have complex health conditions.

No. Because it’s plant-based and highly absorbable, excess calcium is eliminated naturally through urine — not stored in the kidneys or arteries. Our OsteOrganiCAL formulas are a gentle calcium supplement, easy on digestion and free of the chalky residue found in traditional calcium pills.

Take 4 capsules daily — preferably with food. You can also open the capsules and mix the powder into yogurt or smoothies.

Calcium supplement restults timeline can vary, but most customers begin noticing benefits like reduced joint pain, stronger nails, and improved energy within 4–8 weeks. Bone density improvements may take several months and should be measured with a DEXA scan for accuracy.

The recommended daily calcium intake varies by age and gender (typically 1,000–1,200 mg for adults). Our formula provides 800 mg per serving — in a highly absorbable form — and complements dietary intake.

That’s great! But many people still fall short — especially if their food-based calcium isn’t absorbed well. OsteOrganiCAL^® ensures you're getting bioavailable calcium that works synergistically with other key nutrients for bone strength.

Yes. Multiple case studies, reviewed by Dr. Susan E. Brown, PhD, show measurable improvements in bone density using our marine-based calcium system. While results vary, these stories highlight real-world success. See our OsteOrganiCAL Bone Density Study results within our Case Studies page (link to it here) to learn more.

Through a DEXA scan — a diagnostic tool that tracks changes in bone mineral density (T-scores). We recommend getting a scan at the beginning and after consistent use (6–12 months) to track improvement.

Dr. Susan E. Brown, a certified clinical nutritionist and medical anthropologist, reviewed multiple cases showing bone density increases using OsteOrganiCAL^®.

Yes. We offer a 30-day, no-questions-asked refund policy if you're not satisfied. Additionally, we provide a 1-year refund guarantee with proof of no bone density improvement after consistent daily use and two DEXA scans (initial + follow-up).

Yes — all U.S. orders over $75 qualify for free shipping.

Absolutely. Subscribe for automatic monthly delivery and get 10% off every order — plus peace of mind that you’ll never run out.

Our supplements are manufactured in a GMP-certified, FDA-compliant facility and third-party tested for safety and quality. We’ve been producing algae-based calcium products for over 25 years.

We don’t offer free samples, as this is a supplement meant for long-term use. However, we stand behind our formula with a 30-day money-back guarantee so you can try it risk-free.

Yes. OsteOrganiCAL^® is 100% vegan, plant-based, non-GMO, and free from artificial fillers or synthetic additives.