Get this from a library the defensive effects of retinoids in the gastrointestinal tract animal experiments and human observations gyorgy rumi. Rumi g par a matus z rumi gy mozsik gy 2001b the defensive effects of retinoids in the gastrointestinal tract animal experiments and human observations akademiai kiado budapest pp 1 79 google scholar. Results the serum levels of vitamin a and zeaxanthin since the year of l980 we have studied the role of were decreased significantly in all groups of patients retinoids in protecting gastrointestinal mucosa in animal with gastrointestinal gi tumors except for vitamin a experiments and human observations 1 4 retinoids are in patients with . Furthermore the animal experiments do not totally mimic the human diseases the presented observations were based on the gastrointestinal mucosal preventive effects of retinoids in gastrointestinal mucosal damage produced by significantly different noxions agents as physical chemicals xenobiotics different stress etc in different groups
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