Seacal Plus - Plant Based Calcium supplement is made from Organic sea algae, harvested off the coast of Ireland.  Natural Balance (R) SeaCal Plus is Far More than Calcium Alone. SeaCal Plus has 73 trace minerals naturally occurring; together with Magnesium, Boron, Vitamin D3, and natural K2. Why is SeaCal Plus Canada's top selling Calcium supplement? 1. Plant sourced supplements are like food - 99% Absorption and utilization by the body.  2. Vitamin K2 gets more calcium into bones & prevents calcification in arteries. 3. Vitamin D3- ensures calcium gets to your bones. 4. Our calcium supplement includes 73 trace minerals offering natures spark of life for optimal health in every capsule.