It's recommended that Fountain of Life be placed under the tongue where it is absorbed sublingually or ingested and absorbed through our digestive system. When it enters the plasma in our blood, this Norwegian spruce extract is converted to enterolactone, a powerful human antioxidant. Enterolactone neutralizes free radicals that can lead to potential cellular damage over time and inflammation that can lead to cardiovascular disease. Not all plants lignans convert as efficiently and completely as Fountain of Life, making this nature’s most powerful antioxidant. The World's Most Powerful Functional Food. The patented extraction process creates a food safe product that can be ingested. It's incredibly safe, there is NO toxicity level established.