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Life Extension has the whole dietary supplement alphabet covered. The science supporting the use of natural supplements is the driving force behind their vitamins. The company’s products are developed to incorporate the latest scientific research findings to optimize the potential health benefits of everything they sell. Life Extension offers pharmaceutical-grade products whose value has been well documented in double-blind, placebo controlled tests. Swanson is proud to offer Super K, Super Zeaxanthin and Super Bio-Curcumin among more than 150 of Life Extension’s most popular dietary supplements.