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- Plant-based calcium supplement derived from marine algae.
- Contains magnesium, vitamin D3, vitamin K2-7, boron, and trace minerals.
- Marketed to improve bone density and reduce bone loss.
- Premium pricing compared to traditional calcium supplements.
AlgaeCal Plus – Health Insiders Images
What is AlgaeCal Plus?
AlgaeCal Plus is a capsule-based dietary supplement formulated to support bone density and skeletal strength.
It claims to support:
- Bone mineral density
- Reduction of bone loss
- Improved calcium absorption
- Long-term bone strength maintenance
- Support for osteopenia and osteoporosis prevention
AlgaeCal Plus is made with plant-sourced calcium of red marine algae (Mesophyllum superpositum), unlike traditional calcium supplements. It targets adults above 40 who worry about the loss of bone density with age.
AlgaeCal Plus – Quick Facts & Specs
AlgaeCal Plus is a marine algae-derived calcium supplement formulated with vitamin D3, vitamin K2, magnesium, and trace minerals to help support bone density, strength, and overall skeletal health maintenance.
- Form: Capsules
- Type: Bone Support Supplement
- Brand: Algaecal
- Benefit: Supports bone density and mineral absorption
- Price: $76.50*
- Used For: Osteopenia, bone density support
- Recommended Dosage: 4 capsules daily (2 capsules twice a day with meals)
- Number of Servings Per Container: 30 servings (120 capsules)
- Active Ingredients: AlgaeCal® (Mesophyllum Superpositum), Calcium, Magnesium, Vitamin D3, Vitamin K2, Boron, Vitamin C, Strontium
Pros and Cons of AlgaeCal Plus
- Clinically supported to increase bone density
- It has 16 vital nutrients that support the bones.
- More expensive than the conventional calcium supplements.
- Requires four capsules daily
- Results may take months
- Mixed customer reviews
- Iodine sensitive persons may not react well to it.
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*All individuals are unique. Your results can and will vary.
How Does AlgaeCal Plus Work?
AlgaeCal Plus is formulated to deliver calcium and nutrients which aid in the regulation of calcium metabolism and bone remodelling.
- Vitamin D3 helps in the absorption of calcium in the intestines.
- Vitamin K2 helps direct calcium into bones rather than soft tissues.
- Magnesium helps in the structure of bones and enzymes.
- Boron may assist mineral retention and vitamin D metabolism.
The calcium source is derived using algae which is said to be more bioactive compared to rock-based calcium. However, there are limitations on large independent long-term studies, and enhancement of bone density generally takes long-term regular use.
AlgaeCal Plus Ingredients
AlgaeCal® (Mesophyllum Superpositum) – This marine algae is a natural, plant-based calcium source that contains all 13 essential bone-supporting minerals. It’s easily absorbed by the body, unlike traditional rock-based calcium supplements.
A study published in the International Journal of Medical Sciences showed AlgaeCal increased bone mineral density in women over 40 without side effects.[1]
Calcium (720 mg from AlgaeCal) – Calcium is essential for building and maintaining strong bones. It also supports heart health, muscle contractions, nerve transmission, and more.
A study published in Nutrients showed that calcium intake is important for bone development and metabolism[2]
Magnesium (350 mg) – Magnesium complements calcium by supporting bone structure and helping regulate calcium metabolism. It also plays a role in over 300 enzyme reactions in the body, including energy production and nerve function.
Research showed that magnesium intake is positively associated with bone mineral density in adults.[3]
Vitamin C (50 mg) – Vitamin C is crucial for collagen production, which forms the framework of bones. It also supports immunity and acts as a powerful antioxidant.
Vitamin D3 – Vitamin D3 helps your body absorb calcium and supports immune, muscle, and brain function. Without it, calcium absorption is compromised.
Research published in the Dovepress confirms that D3 supplementation significantly increases calcium absorption and bone density.[4]
Boron – Boron helps the body retain calcium and magnesium and boosts the metabolism of vitamin D, making it essential for bone health.
Vitamin K2 (100 mcg, MK-7) – Vitamin K2 directs calcium into bones and away from arteries, reducing the risk of arterial calcification. It’s critical for proper bone remodeling.
A study published in Nutrients shows that MK-7 increases bone mineral density and promotes bone quality and strength.[5]
Strontium (Trace amount) – Strontium supports bone health by both stimulating bone formation and slowing bone breakdown, a rare dual action among minerals.
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*All individuals are unique. Your results can and will vary.
AlgaeCal Plus Side Effects, Interactions & Who Should Avoid It
Even calcium supplements can cause side effects.
Possible side effects include:
- Digestive discomfort: Some people may experience temporary digestive issues as their body adjusts to increased calcium and mineral intake, especially if taken without food or enough water.
- Fatigue: A small number of users report feeling unusually tired, which may relate to how their body reacts to mineral changes or individual sensitivity.
- Iodine sensitivity reactions (marine algae origin): Because the calcium comes from marine algae, it naturally contains iodine, which may trigger reactions in people with thyroid conditions or iodine sensitivity.
Who Should Avoid It?
- Pregnant or breastfeeding women
- Individuals with kidney disease
- People with hypercalcemia
- Those on thyroid medications
- Patients with kidney stones history
There is the possibility that calcium supplements react with thyroid medications, antibiotics, and some osteoporosis medications. Always consult a healthcare provider before starting supplementation.
Is AlgaeCal Plus Safe to Use?
AlgaeCal Plus is made up of nutrients that are considered to be safe when consumed in their recommended amounts. Nevertheless, too much calcium can raise the risk of having kidney stones in people who are already prone to them.
Although it is tolerated by a lot of users, others report having digestive discomfort or not seeing any difference in bone scans. The efficacy differs with respect to diet, pre-existing bone density and general health.
AlgaeCal Plus Customer Reviews
Customer reviews for AlgaeCal Plus are mixed.
I took AlgaeCal Plus for six months. My bone scan showed only minor improvement. It may work slowly, but the cost is high. – Daniel M.
I experienced bloating and fatigue within the first week. I stopped using it and symptoms resolved. – Maria H.
I didn’t notice dramatic changes, but I appreciate the plant-based formula and continue using it. – Eleanor B.
How to Use AlgaeCal Plus?
Take 4 capsules daily, split into two doses with meals. For best results, use consistently for 6–12 months to see changes in bone density.
AlgaeCal Plus: Packages, Deals, Prices
The pricing of AlgaeCal Plus on Amazon is $76.50*. Price may vary depending on where it is purchased.
Where To Buy AlgaeCal Plus?
AlgaeCal Plus is available through online marketplaces such as Amazon and Walmart. Refund policies may vary depending on where it is purchased.
Final Verdict
Though AlgaeCal Plus offers a good solution in the support of bone density and serves as a solution that contains the plant-based calcium and other bone-enhancing elements, the results are not expected to manifest quickly, and it may require the long-term use of up to 6-12 months.
The high cost of the product might not be worth its functionality to all users and the mixed reviews suggest that it is not possibly applicable by people with some sensitivity.
In case you need faster outcomes or less expensive solutions, you may perhaps consider other bone health supplements. It is always advisable to seek the advice of a health professional before settling on the best alternative to meet your needs.
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*All individuals are unique. Your results can and will vary.
Frequently Asked Questions
Q: Does AlgaeCal Plus increase bone density?
A: Some small studies suggest potential improvement over time, but results vary and require long-term use.
Q: How long does it take to see results?
A: Bone remodeling is slow. Most users need 6–12 months before measurable changes may appear.
Q: Is it FDA-approved?
A: No dietary supplement is FDA-approved, though products may be manufactured in FDA-registered facilities.
Q: Is AlgaeCal Plus vegan?
A: Yes, the calcium source is plant-based from marine algae.
Q: Can I take it with thyroid medication?
A: Consult your healthcare provider, as calcium may interfere with medication absorption.
5 Sources
Health Insiders relies on peer-reviewed studies, academic research institutions, and medical associations. We avoid using tertiary references. You can learn more about how we ensure our content is accurate and current by reading our editorial policy.
[1] Kaats GR, Preuss HG, Croft HA, Keith SC, Keith PL. A comparative effectiveness study of bone density changes in women over 40 following three bone health plans containing variations of the same novel plant-sourced calcium. Int J Med Sci. 2011 Mar 2;8(3):180-91. doi: 10.7150/ijms.8.180. Erratum in: Int J Med Sci. 2013;10(9):1135. PMID: 21448303; PMCID: PMC3053489.
[2] Vannucci L, Fossi C, Quattrini S, Guasti L, Pampaloni B, Gronchi G, Giusti F, Romagnoli C, Cianferotti L, Marcucci G, Brandi ML. Calcium Intake in Bone Health: A Focus on Calcium-Rich Mineral Waters. Nutrients. 2018 Dec 5;10(12):1930. doi: 10.3390/nu10121930. PMID: 30563174; PMCID: PMC6316542.
[3] Ryder KM, Shorr RI, Bush AJ, Kritchevsky SB, Harris T, Stone K, Cauley J, Tylavsky FA. Magnesium intake from food and supplements is associated with bone mineral density in healthy older white subjects. J Am Geriatr Soc. 2005 Nov;53(11):1875-80. doi: 10.1111/j.1532-5415.2005.53561.x. PMID: 16274367.
[4] Sunyecz JA. The use of calcium and vitamin D in the management of osteoporosis. Ther Clin Risk Manag. 2008 Aug;4(4):827-36. doi: 10.2147/tcrm.s3552. PMID: 19209265; PMCID: PMC2621390.
[5] Sato T, Inaba N, Yamashita T. MK-7 and Its Effects on Bone Quality and Strength. Nutrients. 2020 Mar 31;12(4):965. doi: 10.3390/nu12040965. PMID: 32244313; PMCID: PMC7230802.
Strong Evidence
Moderate Evidence
Yes
Dr. Meghan Scott, BScH, BScAHN, MBBS, RD
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Felt Worse After Starting This Supplement
I felt unusually tired and bloated after just a few doses. Continued for a week but symptoms got worse. Disappointed and won’t be purchasing again.
Didn’t Improve My Bone Density
Took AlgaeCal Plus faithfully for six months. My DEXA scan showed no real improvement. For the price, I expected better. Not worth the hype.
Too Expensive for Minimal Effect
After consistent use, I noticed barely any change. Four capsules daily is a hassle, and the cost is just not justified by the slow or mild results.
Gradual Results, Still Monitoring Progress
I’ve been taking AlgaeCal Plus for a few months. No major changes yet, but no side effects either. Hoping for more visible improvement in my next bone scan.
I didn't saw noticeable results
I took AlgaeCal Plus for over four months with zero improvement in my bone scans. Felt like a waste of time and money
Didn’t Notice Any Major Bone Changes
I used AlgaeCal Plus consistently for months but didn’t see a noticeable improvement in my bone density reports. It might not work for everyone.
What was I doing wrong?
I have been taking Algecal for 5 years and my bone density has processed to osteoporosis. Don’t know what has happened.
It Made Me Sick to My Stomach.
Algaecal Plus is easy to swallow but it made me sick to my stomach. Also, my tt made me hyper and nervous. I had to put them down. This is what happened to mine.