THE PRESENT INVENTION PROVIDES A SUGAR CONTENT-IMPROVING MATERIAL THAT CAN PREVENT OXIDATIVE DAMAGE OF FRUITS AND VEGETABLES AFTER HARVESTING AS WELL AS CAN IMPROVE THE SUGAR CONTENT, A METHOD FOR IMPROVING THE SUGAR CONTENT OF FRUITS OR VEGETABLES, FRUITS OR VEGETABLES HAVING AN IMPROVED SUGAR CONTENT, A SUGAR COMPONENT-ADJUSTING MATERIAL, A METHOD FOR ADJUSTING A SUGAR COMPONENT OF FRUITS AND VEGETABLES, FRUITS OR VEGETABLES HAVING AN ADJUSTED SUGAR COMPONENT, A TASTE-ADJUSTING MATERIAL, A METHOD FOR ADJUSTING THE TASTE OF FRUITS OR VEGETABLES, AND FRUITS OR VEGETABLES HAVING ADJUSTED TASTE. THE SUGAR CONTENT-IMPROVING MATERIAL INCLUDES A BREATHABLE, PERMEABLE AND FLEXIBLE SHEET CONTAINING PROANTHOCYANIDIN AND TREHALOSE. THE PROANTHOCYANIDIN IS CONTAINED IN THE SHEET IN A PROPORTION OF 250 TO 300 MG/M2. THE TREHALOSE IS CONTAINED IN THE SHEET IN A PROPORTION OF 5 G/M2.
