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BONE HEALTH SUPPLEMENTS > REVIEWS
BONE HEALTH SUPPLEMENTS > REVIEWS
2025's Leading Algae-Based Bone Health Supplements - Analyzed & Reviewed For Bone Support
By Josie Sheerwood May 29, 2024
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Why Your Calcium Supplements Aren't Enough
If your DEXA bone scan results aren't improving despite taking calcium supplements regularly, the problem isn’t the amount of calcium or type of calcium you're taking. Calcium alone isn't enough to grow stronger bones (1). Most traditional calcium supplements are also made from rocks, which our bodies have trouble absorbing and using.
Your skeleton continually remodels itself, breaking down and rebuilding our bone structure (2). As we age, the body's ability to absorb calcium and other nutrients declines significantly, especially post-menopause. This leads to reduced bone density and increased risk of fracture (3).
New analysis reveals top-performing brands in the competitive algae-based calcium supplements market.
A groundbreaking innovation has emerged in the calcium supplement industry, revolutionizing the way we support bone health.
Introducing Algae Based Calcium supplements - a natural powerhouse derived from red marine algae, loaded with essential ingredients tailored for bone development.
These supplements are rapidly gaining popularity due to emerging research on algae-based calcium's unique absorption profile (4). Studies suggest that marine-sourced calcium may provide enhanced bone health support when used as part of a balanced diet.*
What makes them unique? Research suggests that algae-based calcium may offer enhanced absorption compared to some traditional calcium sources, thanks to the inclusion of vital nutrients like Vitamin D & Vitamin K, which are essential for calcium uptake (5).*
Unlike traditional rock-derived calcium carbonate, algae-based calcium is plant-sourced and naturally contains beneficial trace minerals.*
But just like with anything that works this well & this good, the market is now seeing a surge of look-a-like brands.
An evaluation of 18 algae-based calcium supplements from 14 different brands revealed 4 standout formulas for supporting bone health effectively.
Do Algae-Based Calcium Supplements actually work?
From research, we found that some brands can support bone health by providing key nutrients that contribute to maintaining bone strength.* This can be especially beneficial for those who are concerned about bone health or looking to maintain healthy bone density as they age (6)."
However, this highly depends on the ingredients present & more importantly the quantity of ingredients present in the supplement.
You may see the same mineral on all supplements, but it’s their ratio & quantity that really matters for real-life results.
What to Avoid in Bone Health Supplements?
🚫 Excessive Strontium Doses: Strontium is naturally present in trace amounts in bone tissue. High-dose strontium supplements incorporate into bone structure, replacing calcium due to strontium's higher atomic weight, which artificially inflates bone density scan readings.*
🚫 Low-Quality Magnesium Forms: While some supplements use magnesium oxide, research shows this form has significantly lower bioavailability compared to marine-sourced alternatives.*
Do Algae-Based Calcium Supplements work for people above 40?
Absolutely! Algae-based calcium supplements are designed to support bone health for people over 40. They’re effective for everyone, whether you’re just in your 40s or well into your senior years.
Must-Have Ingredients For Helping Promote Bone Density
✅ Plant Sourced Calcium (720mg/serving)
Calcium not only fortifies our bones and teeth but also helps our muscles move smoothly and our nerves to chat with our brains (7). But why do we specifically mention plant-based calcium? Because this form of calcium is easily absorbed by your bones. Research suggests that plant-based calcium is more easily absorbed by the body and may help support healthy bone density.*
✅ Vitamin D: Essential For Calcium Absorption
Vitamin D is crucial for effective calcium absorption in your body. Without sufficient vitamin D, your body can't properly absorb calcium, regardless of how much you consume. This key nutrient ensures that the calcium you take in from your diet or supplements is efficiently utilized to strengthen your bones, keeping them healthy and resilient. Including vitamin D in your regimen is essential for maximizing the benefits of calcium and maintaining optimal bone health (8).
• Vitamin D is the key ingredient that helps your body actually absorb calcium.
✅ Vitamin K2: Directs Absorbed Calcium to Bones
Vitamin K2 plays a vital role in bone health by ensuring that absorbed calcium is directed to your bones where it’s needed most. This essential nutrient helps guide calcium away from soft tissues, such as arteries and organs, and into your bone matrix, enhancing bone density and strength (9). Incorporating Vitamin K2 into your supplement regimen is crucial for optimizing calcium utilization and supporting overall skeletal health (10).
• Vitamin K2 is the ingredient that directs the ABSORBED CALCIUM into bones.
Other Powerful Ingredients To Look For
✅ Highly Bioavailable Magnesium Paired with Calcium
Many calcium supplements cause digestive upset because they either lack magnesium entirely or use cheap, poorly absorbed forms like magnesium oxide.
Magnesium oxide has extremely low bioavailability - meaning most of it passes through your system unused while potentially causing stomach irritation and digestive issues.
That's why pairing calcium with premium, marine-sourced magnesium ensures proper absorption and supports functions like bone-building & digestion
That’s because your ordinary supplements do not have magnesium present in them.
✅ Vitamin C
Vitamin C helps your body fight the root cause of bone loss. It aids in collagen production, which is vital for strong bones. A 17-year study found that high Vitamin C intake significantly reduces the risk of hip and non-vertebral fractures. By supporting collagen formation and protecting bone cells from oxidative stress, Vitamin C helps maintain bone density and strength, making it a key nutrient in preventing bone loss and fractures (13).
✅ Boron
Boron is a vital trace mineral that plays a significant role in maintaining strong and healthy bones. It supports the body's use of calcium, magnesium, and vitamin D, all crucial for bone health. Research shows that adequate boron intake can enhance bone density and reduce the risk of osteoporosis. By aiding mineral absorption and promoting bone growth, boron is essential for maintaining optimal bone strength and preventing bone-related issues as you age (14).
What to Expect?
Leading bone health researchers emphasize that consistent, comprehensive nutritional support is essential for optimal bone maintenance, with clinical studies examining* that calcium and vitamin D supplementation, combined with trace minerals, plays a crucial role in supporting bone health when used as part of a balanced diet and healthy lifestyle.* Research shows that bone health is an ongoing process that benefits from daily, consistent support rather than sporadic supplementation, and adequate calcium and vitamin D throughout life, as part of a well-balanced diet, may reduce the risk of osteoporosis.*
Tip: Consistency is key. Supporting bone health is a long-term commitment that works best when combined with a balanced diet and regular physical activity.
Top Algae-Based Bone Health Supplements - Analyzed & Reviewed For Bone Support
18 algae-based calcium supplements from 14 brands were examined based on various bone health factors.
The assessment for each supplement covered its:
• Effectiveness in supporting bone density.
• The ability to help promote bone health and bone density with research-backed ingredients*
• And the rate at which the body absorbs the minerals.
Additionally, we thoroughly reviewed the packaging and certifications of these supplements to ensure that the ingredients meet high quality and safety standards.
Helps Promote Bone Density: A+*
Pros:
Cons:
Complete Bone Health Support with Research-Backed Formula That Helps Promote Bone Density*
Only available through online channels.
OceanEssence combines Aquamin™ (sourced from unique red marine algae off the Icelandic coast) with other essential ingredients to deliver 9 key nutrients that support bone health.*
Currently only available in the US Market
365-Day Money Back Guarantee
Usually, out of stock due to high demand.
Features Aquamin Mg - shown to have 9× better bioavailability than standard magnesium.*
Allergen free & contains no GMO’s
Contains manganese, boron & copper to support joint health.
Contains Vitamin K & Vitamin D for optimal absorption of Calcium in your bones.
Third-Party Tested for Purity & Potency
Boosts Immune System
Improves Gut Heath
*Rankings based on Wellnessproductguide.com's independent evaluation criteria. Individual results may vary. This product is not intended to diagnose, treat, cure, or prevent any disease.
This brand has garnered exceptional feedback from our team. It contains all 9 research-supported ingredients shown to support bone health and bone density maintenance.
And it is made from Aquamin™ (uniquely sourced Red Algae from the islands of Iceland).
What Is So Special About It Being Made From
Aquamin™?
Aquamin™ is made with 'Lithothamnion sp.,' a red marine algae flourishing in the pristine waters off Iceland. This plant organically absorbs nutrients from the ocean which mirrors the composition of human bones. Providing the perfect synergy of nature's best all-natural ingredients.
To tell you about the benefits of Aquamin™, here is what the UK’s NHS has to say about it:
Aquamin™ has been extensively researched as a marine mineral ingredient, with clinical studies examining its potential for joint mobility and physical function support.* This research-backed ingredient has been featured in peer-reviewed publications and research indicates its naturally diverse mineral spectrum may provide enhanced nutritional support.*
Another article written in America’s National Centre for Biotechnology states that:
Multiple reports suggest that a multi-mineral approach with Aquamin™ may offer unique benefits compared to calcium alone.*"
Aquamin™ contains all crucial ingredients as stated above, like Magnesium, Calcium,
Vitamin D, Vitamin K, and more in natural form.
It's as if nature has a perfect answer for maintaining bone strength and supporting skeletal wellness.
That’s why OceanEssence supplement is so effective and delivers exceptional results through its innovative formula.
What were the cons?
The only drawback is that it’s not available in stores. Currently, it is only offered through online channels like their website. Also, the word is out for their effectiveness. So, it’s usually out of stock on their website.
Shop Ocean Essence Now
Update: OceanEssence is in stock again, so you might want to check it out. Before supplies run out.
Bone Health Improvement: B+
Pros:
Cons:
100% organic, plant-based with multiple certifications
Real food base from 20+ fruits and vegetables
Lacks essential bone matrix nutrients that Ocean Essence provides: Vitamin C, silica, boron, copper, and manganese
Gluten- Free, Certified Vegan, Kosher
Lower Vitamin K2 dosage than Ocean Essence (80mcg vs 100mcg)
With Magnesium, Vitamin D3 from Lichen and Vitamin K2 as MK-7
37% less Vitamin D for absorption than Ocean Essence (1,000 IU vs 1,600 IU)
*Rankings based on Wellnessproductguide.com's independent evaluation criteria. Individual results may vary. This product is not intended to diagnose, treat, cure, or prevent any disease.
Overall, Garden of Life's plant-based formula is strong, offering a fully organic and vegan-friendly supplement. But Ocean Essence delivers 60% more Vitamin D (1,600 IU vs 1,000 IU)* per serving for optimal calcium absorption*.
The Ocean Essence formula also includes nearly triple the magnesium (175mg vs 60mg), a critical mineral that works synergistically with calcium for bone formation*.
Additionally, Ocean Essence provides targeted bone-supporting minerals like silica, boron, and copper that Garden of Life's formula lacks, plus Vitamin K2 in the preferred MK-7 form.
While Garden of Life provides quality organic calcium with good absorption, Ocean Essence offers higher vitamin D levels, a comprehensive mineral profile, and additional co-factors.
For those seeking maximum nutritional support rather than just calcium quantity, Ocean Essence offers a comprehensive formulation*.
Shop Garden Of Life
3: Naturelo | Outstanding Performer
Bone Health Support: B
Pros:
Cons:
Good for improving bone health
Contains 600mg of calcium per serving, which is less than Ocean Essence.
Follows FDA guidelines
Contains less boron and vitamin k2 compared to (Ocean Essence.)
Contains Magnesium, Vitamin K2 & other necessary ingredients for calcium absorption
*Rankings based on Wellnessproductguide.com's independent evaluation criteria. Individual results may vary. This product is not intended to diagnose, treat, cure, or prevent any disease.
Naturelo's supplements contain ingredients that may support bone health. They follow FDA manufacturing guidelines
However, the calcium content in each serving and magnesium content of only 1:3 make their supplement less than ideal choice compared to other brands. However, these are still very good. And you can check their availability on their website.
Shop Naturelo
4: New Chapter | Reliable Choice
Bone Health Support: B-
Pros:
Cons:
Good for improving bone health
Contains lower levels of magnesium compared to Ocean Essence.
Contains mostly all-natural ingredients
No Mention Of Clinical Studies
Formulated for optimal calcium absorption
No Guarantee Offered
*Rankings based on Wellnessproductguide.com's independent evaluation criteria. Individual results may vary. This product is not intended to diagnose, treat, cure, or prevent any disease.
Our last runner-up is still a great choice for your bones. The bad thing however was that the content only had 62 mg of magnesium while it contained 902 mg of calcium. Which is way below than ideal 2:1 required by our body.
This may support your bone health. Ocean Essence. provides a more complete nutritional approach with its full spectrum of marine minerals.
You can check their availability here:
Shop New Chapter
Why Our Team Chose OceanEssence As Number 1 Pick
After reviewing 14 different brands, OceanEssence was consistently identified as our top rated, due to several standout features that distinguish it from others.
Includes Essential Ingredients for Bone health: OceanEssence formula is designed with all the key nutrients and ingredients believed to support healthy bone density
As you know by now, just having calcium or merely other ingredients is not enough. They need to be present in perfect proportions & the right quantity. And OceanEssence ticked all the boxes.
Offer An Unmatched Guarantee:
Not only does their supplement offer comprehensive bone support, but they offer a 365-day money-back guarantee, which is completely unheard of in the supplements industry.*Terms and conditions apply. See company website for details.
This demonstrates the company's confidence in their product quality and customer satisfaction.
Sourced From Natural Materials:
While many calcium supplements cut corners by using rock-based calcium, OceanEssence stands out by harnessing Red Algae, nature’s underwater treasure, providing a pure, potent, and bioavailable form of calcium that your body may absorb well.*
Research-Backed Formula:
Aquamin's™ distinctive red marine algae composition has been studied extensively by researchers investigating its contribution to bone density maintenance and skeletal health support.
Competitive Pricing:
OceanEssence offers more than just affordability at under $2/day. OceanEssence delivers premium bone nutrition with a unique marine mineral complex. Our formula provides essential nutrients that support healthy bone density and maintenance, while our natural mineral matrix helps maintain optimal skeletal health.
Shop the number #1 pick: OceanEssence
Below are some frequently asked questions by our readers:
Does Algae-Based Calcium really work?
Research suggests that algae-based calcium may help support bone health and density as part of a balanced diet and healthy lifestyle.* Its unique source from algae provides a bioavailable form of calcium that research indicates may be well-absorbed by the body (15).
Is Algae-Based Calcium suitable for different ages?
Algae-based calcium may be suitable for adults seeking bone health support. Always consult your healthcare provider.*"
Is Algae-based Calcium safe?
Yes, Algae-Based Calcium is considered safe for most people when taken as directed. It is derived from natural sources and is generally well-tolerated. However, it's always a good idea to consult with your healthcare provider before starting any new supplement regimen, especially if you have any underlying health conditions or are taking medications.
How do I know if Algae-Based Calcium is right for me?
If you're looking to support your bone health, Algae-Based Calcium may be a suitable option for you. It's particularly beneficial for individuals seeking a plant-based or vegan-friendly calcium supplement. However, it's essential to discuss with your healthcare provider to determine if it aligns with your specific health goals and needs.
Does Algae Calcium supplements have a shelf-life?
Yes, Algae Calcium supplements, like other dietary supplements, have a shelf-life. It's crucial to check the expiration date before use and store them according to the manufacturer's instructions to maintain their potency and efficacy over time.
Shop the number #1 pick: OceanEssence
References:
• (1) Heaney R. P. (1991). Effect of calcium on skeletal development, bone loss, and risk of fractures. The American journal of medicine, 91(5B), 23S–28S. - https://pubmed.ncbi.nlm.nih.gov/1750413/
• (2) Hadjidakis, D. J., & Androulakis, I. I. (2006). Bone remodeling. Annals of the New York Academy of Sciences, 1092, 385–396. - https://pubmed.ncbi.nlm.nih.gov/17308163/
• (3) Riggs, B. L., Khosla, S., & Melton, L. J., 3rd (2002). Sex steroids and the construction and conservation of the adult skeleton. Endocrine reviews, 23(3), 279–302. - https://pubmed.ncbi.nlm.nih.gov/12050121/
• (4) O'Gorman, D. M., Tierney, C. M., Brennan, O., & O'Brien, F. J. (2012). The marine-derived, multi-mineral formula, Aquamin, enhances mineralisation of osteoblast cells in vitro. Phytotherapy research : PTR, 26(3), 375–380. - https://pubmed.ncbi.nlm.nih.gov/21751268/
• (5) van Ballegooijen AJ, Pilz S, Tomaschitz A, Grübler MR, Verheyen N. The Synergistic Interplay between Vitamins D and K for Bone and Cardiovascular Health: A Narrative Review. Int J Endocrinol. 2017;2017:7454376. - https://pmc.ncbi.nlm.nih.gov/articles/PMC5613455/
• (6) Lips, P., & van Schoor, N. M. (2011). The effect of vitamin D on bone and osteoporosis. Best practice & research. Clinical endocrinology & metabolism, 25(4), 585–591. - https://pubmed.ncbi.nlm.nih.gov/21872800/
Capozzi, A., Scambia, G., & Lello, S. (2020). Calcium, vitamin D, vitamin K2, and magnesium supplementation and skeletal health. Maturitas, 140, 55–63. - https://pubmed.ncbi.nlm.nih.gov/32972636/
• (7) Berchtold, M. W., Brinkmeier, H., & Müntener, M. (2000). Calcium ion in skeletal muscle: its crucial role for muscle function, plasticity, and disease. Physiological reviews, 80(3), 1215–1265. - https://pubmed.ncbi.nlm.nih.gov/10893434/
• (8) Cashman K. D. (2007). Calcium and vitamin D. Novartis Foundation symposium, 282, 123–218. - https://pubmed.ncbi.nlm.nih.gov/17913228/
• (9) Myneni VD, Mezey E. Regulation of bone remodeling by vitamin K2. Oral Dis. 2017 Nov;23(8):1021-1028. - https://pmc.ncbi.nlm.nih.gov/articles/PMC5471136/
• (10) van Ballegooijen AJ, Pilz S, Tomaschitz A, Grübler MR, Verheyen N. The Synergistic Interplay between Vitamins D and K for Bone and Cardiovascular Health: A Narrative Review. Int J Endocrinol. 2017;2017:7454376. - https://pmc.ncbi.nlm.nih.gov/articles/PMC5613455/
• (11) Bargagli, M., Ferraro, P. M., Vittori, M., Lombardi, G., Gambaro, G., & Somani, B. (2021). Calcium and Vitamin D Supplementation and Their Association with Kidney Stone Disease: A Narrative Review. Nutrients, 13(12), 4363. - https://pubmed.ncbi.nlm.nih.gov/34959915/
• (12) Fouhy, L. E., Mangano, K. M., Zhang, X., Hughes, B. D., Tucker, K. L., & Noel, S. E. (2023). Association between a Calcium-to-Magnesium Ratio and Osteoporosis among Puerto Rican Adults. The Journal of nutrition, 153(9), 2642–2650. - https://pubmed.ncbi.nlm.nih.gov/37164266/
• (13) Sahni, S., Hannan, M. T., Gagnon, D., Blumberg, J., Cupples, L. A., Kiel, D. P., & Tucker, K. L. (2009). Protective effect of total and supplemental vitamin C intake on the risk of hip fracture--a 17-year follow-up from the Framingham Osteoporosis Study. Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA, 20(11), 1853–1861. - https://pubmed.ncbi.nlm.nih.gov/19347239/
• (14) Rondanelli, M., Faliva, M. A., Peroni, G., Infantino, V., Gasparri, C., Iannello, G., Perna, S., Riva, A., Petrangolini, G., & Tartara, A. (2020). Pivotal role of boron supplementation on bone health: A narrative review. Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS), 62, 126577. - https://pubmed.ncbi.nlm.nih.gov/32540741/
• (15) Xu Y, Ye J, Zhou D, Su L. Research progress on applications of calcium derived from marine organisms. Sci Rep. 2020 Oct 28;10(1):18425. - https://pmc.ncbi.nlm.nih.gov/articles/PMC7595125/
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