Evidence supporting the use of: Algas calcareas
For the health condition: Calcium Deficiency
Synopsis
Source of validity: Scientific
Rating (out of 5): 3
Algas calcareas (commonly known as Lithothamnion spp. or red marine algae) is used as a natural calcium supplement to support or treat calcium deficiency. This use is primarily justified by scientific evidence, though it is also popular in traditional and natural health circles. Algas calcareas are rich in bioavailable calcium and other trace minerals. Several studies have evaluated the efficacy of algas calcareas-derived calcium versus conventional calcium carbonate or citrate supplements.
Research indicates that calcium from algas calcareas is well-absorbed and can increase serum calcium levels in humans and animals, potentially helping correct or prevent calcium deficiency. A 2012 randomized controlled trial found that supplementation with algas calcareas increased bone mineral density in postmenopausal women compared to placebo. Additional in vitro and animal studies suggest benefits for bone formation and strength, attributed not only to calcium content but also to magnesium and trace minerals present in the algae.
However, while these findings are promising, the overall body of evidence is still limited compared to more established calcium sources. Most available studies are small or preliminary. No major safety concerns have been identified, but long-term data are lacking. In summary, algas calcareas is supported by a moderate level of scientific evidence as a source of dietary calcium, especially for those seeking plant-based or alternative calcium supplements.