Review Red Mineral Algae is one of the most absorbable calcium supplements available! Algae is rich in calcium and synergistic trace minerals as well as magnesium. No need to take enormous amounts of this product, just two to four caps a day is sufficient to keep bones strong and dense! It’s a good idea to take strontium separately from the red mineral algae to intensify it’s bone strengthening effects. Red Mineral Algae-Aquamin also contains Vitamin D to make it a perfect calcium product for both men and women!