One 'n' Only is designed for those who simply will not take more than one tablet per day, but want the energy and nutritional completion of Life Essence. While we can't provide much calcium or magnesium in a single tablet, we can offer a superb blend of virtually everything else you need. In addition to its vitamins and minerals, One 'n' Only provides over 5900 mgs. of the world's most potent SuperFoods and Tonic Herbs. This is more than any three or four tablet formula (except for Life Essence), and over 20 times more than you'll find in any other once daily multiple. These foods and herbs deliver over 1000 different phyto-nutrients that enhance metabolic efficiency in ways that vitamins and minerals simply cannot do alone.