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Glutagenics™ features three key ingredients – l-glutamine, the bioflavonoid quercetin and zinc. Studies have shown that this combination may together comprehensively support the integrity and optimal function of the gastrointestinal tract. Glutagenics also contains Sustamine® (l-alanyl-l-glutamine). Research has shown Sustamine® helps to increase absorption of l-glutamine. . This is a gentle, yet powerful synergistic blend.