Disclosed is a medicament comprising N-aryl N′ morpholino/piperidino thiocarbamide derivatives represented by the following formula 1 for preventing and treating diabetes, diabetic complications, insulin resistance and insulin resistance syndrome, and can be used in drugs, foods, and beverages inducing an effect of preventing and treating diabetes, diabetic complications, insulin resistance and insulin resistance syndrome of modern people who suffer from the increasing development of diabetes resulting from environmental factors, such as intake of westernized foods, obesity, and so on: wherein, X is O or C, and R represents 4-chlorophenyl, 2-methylphenyl, 3-methoxypheny, 3-methylphenyl, or phenyl group.
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