With fresh kelp & spirulina. We know the kelp in this new product is fresh because we harvest it ourselves. OmegaSea is one of two companies in Alaska with permits to harvest fresh kelp along the rugged shoreline of Southeast Alaska. Loaded with essential minerals and nutrients, this same kelp is also harvested for human consumption. You will notice that the color of this sinking disc is a much richer green than other comparable products. This is because we don't skimp on the 'good stuff'.