AlgaeCal Does What Other Calcium Supplements Can’t

INCREASE Bone Density

Traditional calcium supplements don’t make your bones stronger

Because they can’t. Calcium supplements have been studied since the 1930s and the conclusions are always the same: at best, they can slow bone loss – a little. But they have never increased bone density a single bit. AlgaeCal can and does. It’s true! Studies show that AlgaeCal doesn’t just stop bone loss; it actually makes bones stronger – even if you're in your 60’s, 70’s, and 80s. 

Meet the People Winning the Battle Against Bone Loss

They're increasing their bone density. 

You Can Too.

Why don't traditional calcium supplements work?

Your bones need more than just calcium!

The problem with traditional calcium supplements is that they don’t have enough nutrients. 

So if your store-bought calcium...

Is missing important nutrients your bones crave - it’s like trying to bake a cake with nothing but flour. That’s why every dose of AlgaeCal contains: 

  • 16 minerals and vitamins critical for building strong, healthy bones 

These are the same nutrients shown in human clinical trials to increase bone density.

Plant vs Rock Calcium

Traditional calcium supplements:

  • Made from crushed rocks. Really! Big calcium companies blast slabs of limestone from ‘calcium quarries.’ Those rocks are then ground into a chalky powder and put into ‘health supplements.’ Does that sound healthy to you? 


  • 100% plant-based from algae hand-harvested on South American beaches. And because your body is used to eating plants, it’s easy to digest, gentle on your system, and the minerals are better absorbed

Plant-based Calcium VS. Calcium From Rock

International Journal Of Medical Sciences

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Supported by 3 Clinical Studies!

Only AlgaeCal has been tested in three human clinical trials of adults conducted by experienced researchers. And every single clinical trial came to the same conclusion: It works!

In one study published in The International Journal Of Medical Sciences: 

  • A team of scientists followed 414 AlgaeCal users for one year 
  • The smallest recorded increase in bone density among study participants was 1.3%
  • No side effects were found in blood chemistry tests

How Does Your Calcium Supplement Compare to AlgaeCal Plus?

AlgaeCal Plus

Traditional Calcium Supplements

Body-friendly plant calcium

All 13 bone-building minerals

Clinical studies show increased bone density

Easy-to-swallow capsules

No side effects

Builds healthy new bone at any age

AlgaeCal Plus

Supplement Facts


120 easy-to-swallow veggie capsules per bottle

Serving Size: 4 Capsules

Servings Per Container: 30

Suggested Use:

Amount Per Serving


4 caps daily (2 caps twice a day with food)

Vitamin C 50mg

(as Calcium Ascorbate)



Vitamin D3 1600 IU

(as Cholecalciferol)


30 day supply

Calcium 720 mg

(from Lithothamnion superpositum)


Gluten Free Icon

Gluten Free

Dairy Free Icon


Soy Free Icon


Non-GMO Icon


Magnesium 350 mg

(from Lithothamnion superpositum and Magnesium Oxide)


Boron 3.0 mg

(as Glycinate)


Vitamin K2 100 mcg

(as K2 Vital® Delta MK-7)


Other Ingredients: Vegetable cellulose (vegetarian capsule), magnesium-stearate (vegetable grade), microcrystalline cellulose.

*Daily Value (DV) not established

The AlgaeCal Community

Check in with: 

  • 16,000+ users who offer daily encouragement, support, and practical bone-building tips to those joining them on their bone-health journey.
  • The world’s biggest bone-health resource!

As a member, you’ll get to confide in others who understand your challenges, and who are in—or have been in—the same boat as you!

Plus, you’ll have lifetime access to benefits you can’t get anywhere else – not even on the AlgaeCal website.


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Bone-Building Exercise Videos

Your Questions By Bone Health Experts

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A Peer Group of More Than 16,000 People

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 Live Q/A Sessions

Roll Back The Clock, And Live With Confidence

92,457 people (and counting) have used AlgaeCal to get back their bone strength. They read the page you’re reading now. They imagined how good it would feel to strengthen their bones – safely, naturally, and without any side effects.

They took two easy-to-swallow capsules every morning and another 2 every evening. And by the time their next DEXA bone scan rolled around, the proof was there in black-and-white – their bones were getting stronger!

It’s Time to Reclaim Your Life and Your Bone Health!

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Risk-Free Return Policy:

You get 1 full year to try our products. If for whatever reason you’re not satisfied, we’ll refund all unopened and even partially used bottles.

Buy Now - Because Life Is For Living… 

and you can’t live life to the fullest 

without strong bones.

AlgaeCal is the only natural product on the market that’s been clinically shown to increase bone density. So if you’re looking for a natural way to make your bones stronger – AlgaeCal isn’t an option – it’s the only option!  

Frequently Asked Questions

Who are we?

AlgaeCal has pioneered the multi-nutrient approach to bone health, has supported its effectiveness with clinical studies, and guarantees stronger bones as measured by DEXA, making us the leader in natural bone health since 2002. We are firm believers in the power of nature and the veracity of good science. AlgaeCal is proud to be the first company to popularize a plant as a calcium source in a world of limestone calcium supplements.

Will AlgaeCal Plus interfere with my prescription medications?

Some medications and supplements require separation from AlgaeCal Plus to limit any potential interactions. For example, thyroid medication, antacids, and certain antibiotics should be taken at least 4 hours from both AlgaeCal Plus. Vitamin K, including the vitamin K2 in AlgaeCal Plus, may interfere with certain anticoagulant drugs and should be avoided unless otherwise directed by a physician. Always check with your doctor for details about possible interactions between AlgaeCal products and your medications.

Does AlgaeCal Plus cause side effects such as kidney stones or blocked arteries?

Unlike traditional, rock-derived calcium supplements, AlgaeCal does not cause side effects such as kidney stones or arterial calcification. AlgaeCal is a natural, plant-sourced calcium that is easy for your body to absorb. It’s similar to calcium you get from eating vegetables such as broccoli, kale and peas. Some studies have shown that calcium from food sources does not increase soft tissue calcification because foods that naturally contain calcium also supply other minerals, which helps transfer the calcium directly into your bones rather than soft tissues like arteries, kidneys and eyes. Additional magnesium, boron, vitamin K2 and vitamin D3 are added into AlgaeCal Plus to optimize absorption and transport to the bone rather than soft tissues. All these factors translate to efficient absorption and placement into bone tissue. AlgaeCal is also much safer for you because it is more effective at a lower dose. At 720 mg per day of calcium, AlgaeCal Plus is increasing bone density in adults. Compare that to regular calcium supplements that have been studied at 1200 mg per day – and only slow bone loss.

Does AlgaeCal Plus cause constipation, gas or bloating?

The vast majority of people who experience gastrointestinal side effects from regular calcium supplements have no issue with AlgaeCal. These stomach troubles usually derive from consuming rock-source calcium, which our bodies are not designed to digest. Plant calcium contains a variety of balancing minerals including magnesium, which make it more easily digested. We recommend that you split your daily dose into breakfast and dinner time. Taking AlgaeCal with food increases absorption and reduces chances of any gastrointestinal issues.

I have trouble swallowing pills. How big are the capsules? Is it OK to open the capsules and mix it with food/beverages?

AlgaeCal Plus, AlgaeCal Basic, and Strontium Boost all use soft capsules which are ¾” long and easy to swallow. If you do have trouble swallowing them, the two-part capsules can be pulled apart. You can then sprinkle the tasteless powder into your favorite drinks and food. We recommend semi-solid foods such as smoothies, applesauce or yogurt and avoiding hot drinks as temperatures above 120 degrees Fahrenheit may reduce the potency of the vitamins C, D, and K2. Please note that the AlgaeCal powder is only partially water soluble due to the many natural minerals and therefore does not dissolve completely in liquid.

Is AlgaeCal FDA approved?

The US Food and Drug Administration (FDA) only approves medications. Since AlgaeCal is a completely natural supplement, it’s simply not possible for AlgaeCal to have FDA approval. In saying that, AlgaeCal is registered with the FDA under GRAS status (Generally Recognized as Safe). GRAS status means a food ingredient is deemed safe by a qualified panel of experts.

Is AlgaeCal Plus Vegan?

We understand that more people are adopting a vegan lifestyle and take this into consideration when formulating and sourcing our products. However, we have not found a high-quality, vegan vitamin D source at this time. So while AlgaeCal Basic and AlgaeCal Plus are vegetarian, they are not considered vegan. The source for our vitamin D3 is from lanolin (wool wax). Although no animals are harmed during this process, it is considered an animal product.

Can I take AlgaeCal Plus if I have a shellfish allergy?

AlgaeCal Plus does not contain any shellfish – only calcium, minerals from organic algae and added vitamins. Many of our customers have shellfish allergies and take AlgaeCal safely with no adverse reactions. That being said, for any severe allergies we do advise consulting with your doctor/allergist for their best recommendation.

Can I buy AlgaeCal in stores?

AlgaeCal is only available online because we want to make AlgaeCal accessible to as many people as possible - worldwide - while upholding our high standards. To be completely honest, we wouldn’t have the resources and capacity to do this worldwide if our products were made available in stores. By having customers purchase directly from us, we’re also able to set them up for bone health success by providing them with resources specific to their needs and answering their questions, whether they be about how to take AlgaeCal or about bone health in general!

Copyright © 2022. All rights reserved.

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.