Clinically Supported to Increase Bone Density

Our original red-algae formula helps maintain musculoskeletal health by providing highly absorbable, plant-based calcium, magnesium, and trace minerals, along with added vitamin D3 to improve calcium absorption.

See Product Details Below



Ship Free to Practice or Patient

Practitioner Pricing

Money Back Guarantee

Why AlgaeCal?
Plant-based Formula
13 Minerals with Vitamin D
Sustainably Sourced
Clinically Supported
Plant-based calcium and 13 minerals to stop bone loss.
Plant-based, whole-food calcium made from red algae. Recommended to protect bones from age-related loss and for those unable to take vitamin K2. For patients seeking more rapid gains in bone density, we recommend our AlgaeCal Plus formula in conjunction with Strontium Boost.
  • Features

    Our original formula helps maintain musculoskeletal health by providing highly absorbable, algae-based calcium, magnesium, and trace minerals, along with added vitamin D3 to improve calcium absorption.

    • Formulated from our exclusive red algae (Lithothamnion superpositum) sustainably harvested off the coast of South America.
    • Provides 750 mg of plant-based calcium and 65 mg of naturally occurring magnesium per dose.
    • Naturally contains 13 bone-essential trace minerals, including boron, copper, manganese, silicon, nickel, selenium, strontium, phosphorus, potassium, vanadium, and zinc.
    • Fortified with 1000 IU (25 mcg) of vitamin D3 per dose.
    • Does not contain vitamin K2, making it suitable for adults taking the older class of anticoagulants.
    • Clinically shown to provide BMD increases over baseline. While women over 40 typically lose 1% bone density per year, subjects taking AlgaeCal have demonstrated BMD increases of 1.3%. (Our AlgaeCal Plus formula in conjunction with Strontium Boost provided even greater increases.)
    • AlgaeCal powder is tested for heavy metals, and every product batch is 3rd-party tested to verify nutrient label claims and ensure microbial safety.
    • The raw algae (Lithothamnion superpositum) is USDA certified organic and certified kosher, though the final product is not.
  • Supplement Facts

    Serving Size: 3 Capsules

    Servings Per Container: 30

    Recommended Dose: Three capsules, one with each meal.

    • Vitamin D (as Cholecalciferol) 25 mcg (1000 IU)
    • Calcium (as AlgaeCal® L. superpositum) 750 mg
    • Magnesium 15 mg (as Magnesium Oxide and AlgaeCal® L. superpositum)

    Suggested Use: To increase bone density and maintain musculoskeletal health by providing highly absorbable, algae-based calcium, magnesium, and trace minerals, along with added vitamin D3 to improve calcium absorption.

    Recommended Dose: As a dietary supplement, take 3 capsules daily with food. Taking calcium with meals improves absorption.

    Potential Interactions: Take calcium supplements at least 3 hours apart from the following: quinolone antibiotics and other antibiotics; some heart medications; thyroid medications: water pills; iron supplements; and strontium supplements. In some cases, calcium reduces the effectiveness or required dose for certain medications.

    Cautions: Those who are pregnant or lactating, have a medical condition, or are taking any medication should consult a health care professional prior to use to avoid possible interactions. Keep out of reach of children.

    This product is non-GMO and free from gluten, wheat, dairy, and soy.

Doctor working with their patient
Questions? Our Functional Medicine Team has answers

AlgaeCal products work, learn the latest bone-health research, or get help ordering

Discover how so you can support your patients. Schedule a free one-on-one training session with one of our consultants.

Why AlgaeCal Works
Superior Plant-based Source
AlgaeCal starts with sustainably harvested marine algae.

Unlike rock-based calcium, L. superpositum naturally contains a full spectrum of minerals that bones need, in a whole-food form that’s highly bioavailable.

13 Essential Minerals
Calcium alone is not enough to build bone.

AlgaeCal naturally contains 13 critical bone-building minerals, including several trace elements absent from the typical diet. We add extra boron and magnesium for an ideal balance.

Vitamins D3, K2, and C
That’s the "Plus" in AlgaeCal Plus.

Building on our whole-food formula, we fortify it with vitamin D3 to improve calcium absorption and K2 (MK-7 form) to help direct the calcium to bones and away from soft tissue. The current formula, which also includes vitamin C, is based on the best-performing test groups in clinical studies.

Formulated for Easy Digestion and Safety
Includes vitamin D3 and K2 to alleviate safety concerns.

Many studies questioning calcium safety ignore the need for these supporting vitamins and use mega calcium doses. AlgaeCal provides just 720 mg calcium, accounting for normal dietary intake. Plus, we balance the formula with added magnesium to prevent constipation. In all three clinical studies, AlgaeCal was not associated with adverse health effects.

We partner with the world's leading bone-health scientists
Prof. Didier Hans
Head of Research & Development Center of Bone Diseases, Lausanne University Hospital CHUV, Switzerland
Dr. Liz Lipski
Professor and Director of Academic Development, Nutrition programs in Clinical Nutrition at Maryland University of Integrative Health.
Dr. Loren Fishman
Medical Director of Manhattan Physical Medicine & Rehabilitation and Founder of the Yoga Injury Prevention Website.
Lara Pizzorno
Best-selling author of Healthy Bones Healthy You! and Your Bones; Editor of Longevity Medicine Review, and Senior Medical Editor for Integrative Medicine Advisors.
Clinical Studies Support Efficacy of AlgaeCal Protocol
AlgaeCal is the only calcium supplement clinically supported to increase bone density. Our recommended protocol of AlgaeCal Plus (and companion product Strontium Boost) is based on formulations used in the most effective test groups of our three clinical studies. View Our Research Page.
Cover of the Nutritional Journal edition that featured AlgaeCal
Bone Mineral Density Increases in Just 6 Months with AlgaeCal and Strontium Boost.
  • Demonstrates real BMD increases, averaging 2.18% (annualized)
  • 216 Men and Women
  • Six Months

Read In PubMed

Review Summary
Cover of the International Journal of Medical Sciences edition that featured AlgaeCal
AlgaeCal Formulations Build New Bone as Seen On Before-After DEXA Scans, Safely and Naturally
  • Confirms 1% - 2% BMD gains — and up to 4% with Strontium Boost
  • 414 Postmenopausal Women
  • One Year

Read In PubMed

Review Summary
Cover of the American College of Nutrition edition that featured AlgaeCal
AlgaeCal Users Increase Bone Density Every Year for Seven Straight Years
  • Establishes long-term, linear gains averaging 1% per year, while establishing safety
  • 172 Postmenopausal Women
  • Seven Years

Read In PubMed

Review Summary