Understanding What Type of Magnesium Is in AlgaeCal for Optimal Bone Health

November 1, 2025 •

2 min read

According to AlgaeCal, an estimated 68% to 80% of the US population is deficient in magnesium. When evaluating supplements for bone health, it's crucial to understand what type of magnesium is in AlgaeCal and how its specific formulation supports the body's needs.

Quick Summary

AlgaeCal supplements utilize a dual-source magnesium blend from naturally-occurring red algae and supplemental magnesium oxide to achieve an optimal calcium-to-magnesium ratio.

Key Points

Dual-Source Magnesium: AlgaeCal contains magnesium from two sources: naturally occurring in red marine algae (Mesophyllum superpositum) and added magnesium oxide.
Optimal Ratio: Magnesium oxide is added to balance the mineral content, creating a 2:1 calcium-to-magnesium ratio that mimics the body's natural composition.
Bioavailability Factors: While magnesium oxide is less bioavailable than magnesium citrate, the whole-food nature of the algae-sourced minerals compensates for this.
Synergistic Formulation: Magnesium works with other minerals and vitamins (like Vitamin D3 and K2) in AlgaeCal to support bone metabolism and density.
Product Differences: The amount of magnesium varies between AlgaeCal Plus (350 mg) and AlgaeCal Basic (65 mg), with the Plus version containing additional vitamins.
Digestive Comfort: The plant-based nature of the algae is designed to be gentle on the digestive system compared to some rock-based mineral supplements.

The Dual-Source Magnesium in AlgaeCal

AlgaeCal products, particularly AlgaeCal Plus, source magnesium from two places. The initial source is the magnesium naturally present in the Mesophyllum superpositum red marine algae, which forms the supplement's base. This whole-food source offers a broad range of bone-supporting minerals that are easily absorbed. The second source is added supplemental magnesium oxide.

Why Add Magnesium Oxide?

AlgaeCal includes extra magnesium oxide to attain a specific 2:1 calcium-to-magnesium ratio, which mirrors the ratio found in the human body and is considered optimal for bone health. Magnesium is vital for regulating calcium metabolism. Although magnesium oxide has lower bioavailability compared to some other forms like magnesium citrate, its inclusion is deliberate. The combination of naturally chelated magnesium from the algae and the balancing effect of the added oxide is designed to create a formula effective for promoting bone density.

The Role of Magnesium in Bone Health

Magnesium is crucial for over 300 biochemical reactions in the body and is essential for strong bones and a healthy bone matrix. It works with calcium and Vitamin D to aid their absorption and use. Magnesium deficiency can disrupt calcium metabolism and reduce bone density. AlgaeCal offers a multi-mineral approach to bone health.

The Importance of a Multi-Mineral Approach

AlgaeCal's formula contains multiple bone-supporting minerals from red algae.

Key minerals and nutrients in AlgaeCal include:

Calcium: From red algae.
Magnesium: Assists with calcium metabolism and bone formation.
Vitamin D3: Important for calcium absorption.
Vitamin K2 (MK-7): Guides calcium to bones.
Boron: Helps maintain calcium and magnesium levels.
Strontium: Increases bone-building cells.
Trace Minerals: Includes copper, manganese, silicon, nickel, phosphorus, and zinc, involved in bone formation.

Magnesium Oxide vs. Magnesium Citrate: A Bioavailability Comparison

Supplement bioavailability is influenced by its form. A comparison of magnesium oxide and magnesium citrate can be found on {Link: AlgaeCal https://www.algaecal.com/algaecal-ingredients}.

Different AlgaeCal Product Formulations

Magnesium content varies between AlgaeCal products. Details on AlgaeCal Plus and AlgaeCal Basic, including magnesium sources and amounts, are available on {Link: AlgaeCal https://www.algaecal.com/algaecal-ingredients}.

Conclusion

AlgaeCal includes naturally occurring magnesium from red marine algae and added magnesium oxide. This combination supports a multi-mineral formula with a balanced calcium-to-magnesium ratio for bone health. The overall effectiveness of AlgaeCal is based on its combined ingredients. More details are available on {Link: AlgaeCal https://www.algaecal.com/algaecal-ingredients}.

For more detailed information on the scientific basis of AlgaeCal's ingredients, you can refer to their official website: www.algaecal.com.

Frequently Asked Questions

The primary source of magnesium in AlgaeCal comes from two places: naturally from the red marine algae (Mesophyllum superpositum) and supplemented with additional magnesium oxide.

Magnesium oxide is added to achieve an optimal 2:1 ratio of calcium to magnesium, a ratio supported by clinical studies for bone health. The lower bioavailability of the oxide is complemented by the high absorbability of the naturally chelated minerals from the algae.

In some cases, magnesium oxide is used as a laxative to relieve constipation, but its effect can vary by dose and individual. AlgaeCal products are often considered gentler on the digestive system than rock-based mineral supplements.

Magnesium citrate is generally considered more bioavailable and is better absorbed by the body than magnesium oxide. However, AlgaeCal's overall formula is designed for bone-building, combining the effects of natural algae minerals with the ratio-balancing magnesium oxide.

Yes, AlgaeCal contains 13 naturally occurring, bone-supporting minerals, including trace amounts of strontium, boron, copper, manganese, and zinc.

Magnesium is a key partner to calcium and Vitamin D, helping to regulate calcium metabolism and promote its absorption and incorporation into the bones. The various minerals and vitamins work together synergistically to support bone renewal.

AlgaeCal Plus contains the highest amount of magnesium at 350 mg per daily dose (4 capsules), including both the natural algae-sourced magnesium and added magnesium oxide.