AlgaeCal Plus is a plant-based calcium supplement made from a unique South American marine algae called Mesophyllum superpositum. These USDA-certified organic algae are sustainably hand-harvested from the ocean, gently sun-dried, and milled into a fine powder.

Unlike traditional calcium supplements, which are typically derived from rocks like limestone or marble, AlgaeCal Plus is a whole-food source of all 13 essential bone-supporting minerals: calcium, magnesium, manganese, phosphorous, nickel, silica, copper, vanadium, potassium, zinc, boron, selenium and strontium. And because it comes from a living plant, this natural mineral matrix is easier for your body to absorb and utilize. 

In addition to these 13 minerals we also add full clinical doses of vitamins C, D, and K. 

Clinical research published in three peer-reviewed scientific journals shows that the 16 nutrients in AlgaeCal Plus don’t just slow bone loss; they can actually help increase bone density in adults. No other calcium supplement can make this claim. Because AlgaeCal is the ONLY one that’s clinically supported to increase bone density. 

To maximize your bone-building, take 4 capsules of AlgaeCal Plus a day. (This was the dosage that led to the most significant bone density increases in clinical trials).

We recommend splitting the daily 4 capsule dose into 2 servings of 2 capsules throughout the day. Your body can only absorb 500mg of calcium at a time, so taking more than 2 AlgaeCal capsules in one serving would lead to unabsorbed calcium.

And finally, it’s best to take your AlgaeCal Plus with food. That’s because taking calcium with food increases how well you absorb it. When you eat, your stomach produces acid that dissolves the minerals in AlgaeCal Plus so they can be properly absorbed when they reach your intestinal tract.

For more information on scheduling your AlgaeCal supplements with meals –– and any prescription medication or supplements you’re currently taking –– click here.

AlgaeCal Plus contains 16 nutrients clinically supported to increase bone density.

In fact, AlgaeCal is the only calcium supplement in the world with human clinical studies showing actual increases in bone density—not just a slowdown in bone loss.

These nutrients work together to build new bone and protect the bone you already have:

Plant-Based Minerals (from the USDA-certified organic Mesophyllum superpositum.)

- Calcium – the main structural mineral that gives bones their strength and hardness.

- Magnesium – activates vitamin D and supports the formation of new bone tissue.

- Boron – enhances absorption of calcium and magnesium and helps regulate bone-protective hormones.

- Zinc – essential for collagen synthesis and bone tissue repair.

- Copper – works with zinc to create strong collagen cross-links for flexible, resilient bones.

- Manganese – aids the production of bone cartilage and connective tissue.

- Selenium – powerful antioxidant that protects bone cells from oxidative stress.

- Strontium – naturally occurring trace mineral that supports bone formation and slows bone breakdown.

- Silica (Silicon) – helps initiate bone mineralization and supports collagen production.

- Vanadium – assists enzymes involved in bone growth and mineral metabolism.

- Nickel – required in tiny amounts for enzymes that support bone and cartilage formation.

- Phosphorus – partners with calcium to form the mineral crystals that harden bone.

- Potassium – helps neutralize excess acids in the body that can draw minerals out of bones.

Added Bone-Building Co-Factors

- Vitamin D3 – enhances calcium and magnesium absorption so minerals reach your bones.

- Vitamin K2 (MK-7) – directs calcium into bone and keeps it out of arteries.

- Vitamin C – stimulates collagen production, creating the flexible framework where minerals attach.

AlgaeCal Plus is dairy-free, soy-free, gluten-free, non-GMO, and contains only naturally occurring trace minerals—no synthetic fillers or artificial additives. While we don’t third-party test for these allergens, none are added during manufacturing.

You don’t have to, but if you’re dealing with bone loss, taking AlgaeCal Plus together with Strontium Boost delivers the fastest results.

Clinical studies show:

- AlgaeCal Plus alone can increase bone density by an average of 1.3% per year.

- AlgaeCal Plus + Strontium Boost together produce an average 3% increase in just one year. And most people see results within the first 6 months. 

So when you add Strontium Boost to your AlgaeCal Plus you’re going to build bone faster. That’s right. You’ll build more bone in less time.

And when you take both products together, you’re also covered by our Stronger Bones For Life Guarantee. So when you take AlgaeCal Plus and Strontium Boost, as directed, you’re guaranteed to see measurable bone density increases within six months – or your money back! 

See reviews from people who’ve successfully used AlgaeCal Plus & Strontium Boost here.

Each serving of AlgaeCal Plus provides 360 mg of elemental calcium in two capsules. That’s 720 mg per day when you take the full four-capsule daily dose.

This is the exact amount used in clinical studies that showed measurable increases in bone mineral density.

You don’t need more calcium, you need the right kind of calcium. Unlike ordinary rock-based calcium (from limestone or marble), AlgaeCal Plus delivers plant-based, whole-food calcium with 12 essential bone-building minerals + vitamins C,D,& K. These 16 nutrients are easy for your body to absorb and—most importantly—are clinically supported to increase bone density, something other calcium supplements simply can’t do.

AlgaeCal Plus comes in size zero soft vegetarian capsules which are easy to swallow.

However, if swallowing capsules is difficult, you can gently pull them apart and sprinkle the tasteless powder into food or drinks. Semi-solid foods such as smoothies, applesauce, or yogurt work best.

Avoid mixing the powder into hot liquids above 120°F (49°C), as high temperatures can reduce the potency of vitamins C, D, and K2.

Because the powder contains a wide range of natural minerals, it is only partially water-soluble, so it won’t completely dissolve in liquid.

No. AlgaeCal Plus is safe and without adverse side effects. Here’s why:

- Plant-based, not rock-based: Unlike traditional calcium supplements made from limestone or marble, AlgaeCal Plus is a food-source calcium similar to the calcium found in vegetables like broccoli and kale. So your body recognizes it as food and absorbs it accordingly.

- Balanced with co-factors: Each serving provides additional magnesium, boron, vitamin K2, and vitamin D3. These nutrients work together to move calcium into your bones where it belongs, and away from soft tissues like arteries, kidneys, or eyes.

- Clinically effective at a lower dose: AlgaeCal Plus increases bone density with only 720 mg of calcium per day, the exact amount used in human clinical studies. Traditional calcium supplements often recommend 1,200 mg or more—and still only slow bone loss.

Because AlgaeCal Plus delivers the right kind of calcium, in the right balance, it strengthens bones without the risks of kidney stones or arterial calcification.