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Calcium is an essential mineral required for building and maintaining strong bones and teeth. Calcium deficiency can lead to osteoporosis and increased risk of fractures. Good dietary sources of calcium include dairy products, leafy greens,and fish with bones. However, calcium absorption from food decreases with age.
Calcium supplements become important for older adults. According to studies [1], Red algal calcium may be the best source, as it is highly bioavailable compared to other calcium supplements, such as calcium carbonate.
Red algae contains a balanced mineral profile, including magnesium and boron, which aid in optimal calcium absorption and utilization. Red algae provides an easily digestible, natural form of calcium to fulfill daily requirements and prevent calcium-deficiency related bone health risks.
What Is Red Algae Calcium?
Red algae contains a plant-based, algae-derived form of calcium. It is obtained from red ocean algae, particularly from the species Algas calcareas, which is found in tropical marine areas like reefs. Unlike traditional rock calciums, such as calcium carbonate or calcium citrate, red algae calcium may have better absorption and is naturally rich in various minerals.
It is often used in calcium supplements that target bone health, and is rendered for its high bioavailability and sustainability [2]. Additionally, calcium improves the functioning of the muscles, nerves, and heart and assists with blood clotting. Calcium also works to strengthen the joints and decrease pain and inflammation. Red algae, due to its mineral content including calcium, may help prevent osteoporosis.
Red algae calcium is vegan and eco-conscious because it is typically harvested from the ocean. Thus, making it an excellent choice for individuals concerned with sustainability.
Our Top Picks of 2025
Overall Best: Icelandic Red Algae Calcium
Read The ReviewsBest Supplement for Bones and Joints: Advanced Bionutritionals Ultimate Bone Support
Best Supplements for Bone and Muscles1MD D3
Best Supplement for Bone Density: 1MD OsteoMD
Best Algae Based Calcium Supplement: Algaecal Plus
Best Plant Based Calcium Supplements: Algaecal
Best Red Marine Algae Supplement: Carlyle Red Marine Algae 1600mg
Best Plant-Based Calcium Supplement: New Chapter Calcium Supplement
The Best Right Red Algae Calcium Supplement On The Market
The following are the best-rated calcium supplements that are popular on the market.
Icelandic Red Algae Calcium – Overall Best
*All the prices listed here are as they appear on their websites and are subject to change.
Our Rating
Icelandic Red Algae Calcium supplement has the primary ingredient as red algae. It’s also rich in fruits and vegetables which have nutrients and antioxidants.
This product claims to decrease pain and swelling in the joints, improve flexibility and mobility, promote stronger bones and teeth, strengthen immunity, and improve cartilage health. It claims to includes 100% naturally-sourced ingredients with no harmful fillers.
Key Specs
- Form: Capsule
- Type: Supplement
- Brand: Genf20
- Benefit: This product can decrease joint pain, Improves flexibility and mobility, Promotes the strength of the bones & Decrease joint swelling and inflammation.
- Active Ingredients: VRed Algae Calcium,Vitamin K2, Citrus, Magnesium, Vitamin D3, Organic Kale, Organic Spinach, Organic Tomato, Organic Carrot, Organic Blueberry, Organic Raspberry, Organic Strawberry, Organic Cherry
- Usage: 3 capsules with a meal
- Price: $59.95*
Icelandic Red Algae Calcium Pros & Cons
Pros
- Clinically Studied Formula
- Scientifically Researched Ingredients
- Easy-to-take
- No reported negative side-effects
- 67-day, money-back guarantee
Cons
- This is a very popular supplement which may sometimes go low stock.
- You can only buy Icelandic Red Algae Calcium online.
Advanced Bionutritionals Ultimate Bone Support – Best Supplement for Bones and Joints
*All the prices listed here are as they appear on their websites and are subject to change.
Our Rating
Advanced Bionutritionals Ultimate Bone Support is a comprehensive dietary supplement aimed at enhancing bone health and strength. Its blend of essential vitamins, minerals, and nutrients claims to bolster bone density, minimize bone loss, and foster robust bone formation.
This supplement targets adults seeking to fortify or enhance their bone health, especially those susceptible to osteoporosis or similar conditions.
Key Specs
- Form: Capsule
- Type: Supplement
- Brand: Advanced Bionutritionals
- Benefit: Support healthy bone and collagen growth
- Active Ingredients: Vitamin D3, Vitamin K2 , Manganese, Boron, Silicon, Strontium, L-Lysine, Hops, zinc, copper.
- Usage: 2 capsules a day,
- Price: $39.95*
Advanced Bionutritionals Ultimate Bone Support Pros & Cons
Pros
- It contains a wide range of nutrients
- It doesn’t cause any side effects
- Provides 100% money-back guarantee.
Cons
- The product sells out fast
1MD D3 – Best Supplements for Bone and Muscles
*All the prices listed here are as they appear on their websites and are subject to change.
Our Rating
1MD Nutrition’s D3 supplement is a dietary supplement that contains vitamin D3, which is important for maintaining healthy bones, teeth, and immune function. It is often used to help prevent vitamin D deficiency, especially in people who have limited sun exposure or who have trouble absorbing vitamin D from food.
Key Specs
- Form: Capsule
- Type: Supplement
- Brand: 1MD Nutrition
- Benefit: Help Maintain a Healthy Mood & Proper Muscle Function, Aids Proper Immune, Bone, & Brain Health
- Active Ingredients: Vitamin D3
- Usage: 1 softgel daily with a meal
- Price: $15.99*
1MD D3 Pros & Cons
Pros
- The product supports healthy bones and teeth
- It assists with calcium, magnesium and phosphorus absorption in the body
- This product comes with a 90-day money-back guarantee
- This product is dairy-free, peanut-free, wheat-free, shellfish-free, and non-GMO, making it suitable for individuals with various dietary restrictions
Cons
- The focus is on one primary active ingredient
1MD OsteoMD – Best Supplement for Bone Density
*All the prices listed here are as they appear on their websites and are subject to change.
Our Rating
1MD OsteoMD is scientifically-formulated to support strong, healthy bones and skeletal strength. It combines bioavailable nutrients, including Calzbone® and MenaQ7™, to promote optimal bone health. With vitamin D3 for calcium absorption and bioactive calcium hydroxyapatite for bone mineralization, it claims to reduce the risk of osteoporosis.
Key Specs
- Form: Capsule
- Type: Supplement
- Brand: 1MD Nutrition
- Benefit: Promotes Healthy Bone Density, Supports Proper Heart & Brain Health, Aids Improved Cognitive Functioning
- Active Ingredients: Vitamin D3, Calcium, Vitamin K2, Calzbone
- Usage: 3 capsules, once per day
- Price: $52.25*
1MD OsteoMD Pros & Cons
Pros
- Small size is easy to swallow
- Increases fracture healing times
- Bone mineralization is enhanced
- Studies show an increase in bone density
Cons
- Results vary depending on the individual
- Can only be found on the official website
- Medication interaction was noted
Algaecal Plus – Best Algae Based Calcium Supplement
*All the prices listed here are as they appear on their websites and are subject to change.
Our Rating
AlgaeCal Plus is a natural calcium supplement derived from a unique marine algae called Algas calcareas. It also contains other essential minerals like magnesium, boron, and vitamin D3, which support bone health. This supplement is marketed as a natural alternative to traditional calcium supplements and is often used to support bone density and overall bone health.
Key Specs
- Form: Capsule
- Type: Supplement
- Brand: Algaecal
- Benefit: Increases Bone Density, Aids Calcium Absorption and Mobilization, Promotes Healthy and Strong Bones.
- Active Ingredients: Boron, Vitamin K, Vitamin D3, Vitamin C, Calcium, Magnesium
- Usage: 4 capsules daily
- Price: $69.00*
Algaecal Plus Pros & Cons
Pros
- This product could support bone health.
- It may prevent further bone degradation.
- They guarantee it will increase bone density in 6 months.
Cons
- The product is expensive.
- The ingredient list is quite limited.
- You have to take 3-4 capsules per day.
Algaecal – Best Plant Based Calcium Supplements
*All the prices listed here are as they appear on their websites and are subject to change.
Our Rating
AlgaeCal is a calcium supplement produced by a company called AlgaeCal Inc. that is made from red algae. AlgaeCal claims that their supplements can help slow down bone loss, improve bone strength, and are easily digested.
They believe that because the algae plant gets its calcium and minerals from sea water, the calcium is already broken down and easy for the body to use, especially for bone cells.
Key Specs
- Form: Capsule
- Type: Supplement
- Brand: Algaecal
- Benefit: Stop Bone Loss and Maintain Healthy Bones
- Active Ingredients: Calcium, Magnesium, Vitamin D3
- Usage: 3 capsules daily
- Price: $59.00*
Algaecal Pros & Cons
Pros
- Plant-based Formula
- Contains 13 Minerals with Vitamin D
- 100% Money Back Guarantee
Cons
- This product is only available online.
- The product is expensive for some users.
Carlyle Red Marine Algae 1600mg – Best Red Marine Algae Supplement
*All the prices listed here are as they appear on their websites and are subject to change.
Our Rating
Carlyle Red Marine Algae Supplement is a dietary supplement made from red marine algae, which is a type of seaweed. Red marine algae is rich in nutrients such as vitamins, minerals, and amino acids. This supplement is often promoted for its potential immune-boosting properties and may also be used to support overall health and well-being.
Key Specs
- Form: Capsule
- Type: Supplement
- Brand: Carlyle
- Benefit: Has immune-boosting properties, support overall health and well-being
- Active Ingredients: Calcium, Magnesium, Vitamin D
- Usage: 2 capsules daily
- Price: $18.49*
Red Marine Algae 1600mg Pros & Cons
Pros
- Natural, vegetarian Formula
- Rich in minerals and unique phytochemicals derived from the sea
- 30 Days Money Back Guarantee
Cons
- May not be suitable for all users
New Chapter Calcium Supplement – Best Plant-Based Calcium Supplement
*All the prices listed here are as they appear on their websites and are subject to change.
Our Rating
New Chapter Calcium Supplement is an organic plant-based dietary supplement designed to provide a source of calcium, an essential mineral for bone health, muscle function, and nerve signaling. New Chapter is a well-known brand that offers various types of supplements, including calcium, which is often derived from whole food sources such as algae or plants
Key Specs
- Form: Capsule
- Type: Supplement
- Brand: New Chapter
- Benefit: Strong Bones, Flexible Joints & Heart Health
- Active Ingredients: Vitamin K1, Vitamin K2, Calcium, Magnesium, Vitamin D3
- Usage: 3 tablets daily with food
- Price: $39.99*
New Chapter Calcium Supplement Pros & Cons
Pros
- Organic plant-based Formula
- Easy to swallow and have a slow and steady release
- 100% Money Back Guarantee
Cons
- May be difficult to swallow for some people
- The supplement is expensive compared to other calcium supplements on the market
Benefits of Taking Red Algae Calcium Supplements
Red Algae Calcium is unique and has various benefits for our body. This includes:
Strong Bones and Teeth: Calcium is essential for building and maintaining strong bones and teeth. As we age, it becomes more difficult for the body to absorb calcium from dietary sources alone. Red algae calcium supplements may be a good option to ensure adequate calcium intake, which helps prevent
osteoporosis and the risk of fractures.[3]
Absorption and Distribution: Research has shown that red algae calcium is less likely to accumulate in soft tissues or joints because it is well-balanced with magnesium, unlike other forms of calcium supplements. The possible reduced risk of calcium deposits is beneficial for those concerned with kidney stones or cardiovascular issues. The mineral composition in red algae suggests that the calcium is easily absorbed and distributed throughout the body.
Muscle and Nerve Function: Calcium also plays a role in muscle function and nerve signaling, which red algae may also support due to its calcium content.
Additional Health Benefits: Some research has shown that red algae calcium could assist with weight management. Additionally, It may also help to regulate blood pressure and balance mood.[4] However, more studies are still needed to fully understand these potential health benefits.
Safety and Bioavailability: Red algae calcium is an organic and bioavailable source of this essential mineral to support bone and whole-body health. It supplies calcium in a balanced, bioavailable form that supports both short-term and long-term nutritional needs as we age. For those seeking to enhance their calcium intake, red algae supplements can be a safe, natural option.
How Do You Choose the Right Red Algae Calcium Product?
When selecting a new supplement of any kind, certain criteria is important to consider before making a final buying decision. The key factors are as follows:
Ingredients – Compare the ingredient list with similar brands. Make sure the formula does not contain harmful additives. Read research exploring the efficacy of these ingredients to determine their effectiveness.
Manufacturer – The reputation of the manufacturer is important, as a more highly regarded organization likely is trustworthy and makes high-quality products. Find out about the company and how established it is in the market.
Safety – A good manufacturer follows GMP or another set of reputable manufacturing standards. It should not include any toxic chemicals or artificial ingredients.
Return Policy – A company that has faith in its brand will offer a lengthy and fair return policy of at least 30-60 days. This allows you to try out the product to make sure it works before committing.
Value for Cost – Good products can be found at lower prices and poor products at higher prices. Make sure the ones you choose offer value for the price they are asking, like quality ingredients.
Final Verdict
Red Algae Calcium offers may offer rich health benefits, spefically for the joints and bones. It may help strengthen the bones, reduce joint pain, and lessen the risk of developing osteoporosis.
According to our research, Icelandic Red Algae Calcium is the best red algae calcium supplement on the market, offering unique ingredients and suggested benefits.
The benefits of this product may include promoting joint, bone, and cartilage health, reducing inflammation, and strengthening the immune system. As of yet, there are no comments about this product online since it is a new brand. However, several product reviews raved about the high quality of the supplement.
There should be no red algae calcium side effects associated with taking this supplement. However, it is always best to consult a healthcare professional before starting the supplement.
Frequently Asked Questions
Q: Is calcium from red algae good?
A: Yes, red algae calcium may provide a bioavailable, balanced form of calcium that supports bone health when taken as part of a healthy diet
Q: Does AlgaeCal really work for osteoporosis?
A: AlgaeCal is a dietary supplement that may aid bone health and thus can provide relief for conditions like Osteoporosis but it is not a replacement for prescription drugs in severe cases like Osteoporosis.
Q: Are there any potential side effects of taking red marine algae supplements?
A: No, red algae supplements are generally well-tolerated, when used as directed. But individual results vary, therefore it is best to consult doctor before starting the red marine algae supplement.
Q: Does AlgaeCal really increase bone density?
A: Research suggests that red algae calcium is effective at increasing bone density and reducing osteoporosis risk.
4 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] Comparative effects of a novel plant-based calcium supplement with two common calcium salts on proliferation and mineralization in human osteoblast cells: https://pubmed.ncbi.nlm.nih.gov/20213262/
[2] Comparative characterization study of plant based calcium versus synthetic calcium: https://www.ijpca.org/html-article/15064
[3] A Mineral-Rich Extract from the Red Marine Algae Lithothamnion calcareum Preserves Bone Structure and Function in Female Mice on a Western-Style Diet: https://pmc.ncbi.nlm.nih.gov/articles/PMC2877502/
[4] Calcium supplementation for prevention of primary hypertension: https://pmc.ncbi.nlm.nih.gov/articles/PMC8748265/
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Health Insiders Team
The Health Insiders Team takes pride in bringing you the latest in nutritional research, skincare, healthy living, and wellness hacks. [Read Full Bio]
Brittany Ferri, MS, OTRL, CLT
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