Which food has less impact on blood sugar?

LIGHT TUNA IN WATER (LIGHT TUNA, WATER, VEGETABLE BROTH [CONTAINS SOY], SALT), WHEAT BREAD (ENRICHED WHEAT FLOUR [FLOUR, MALTED BARLEY FLOUR, NIACIN, REDUCED IRON, THIAMIN MONONITRATE, RIBOFLAVIN, FOLIC ACID], WATER, WHOLE WHEAT FLOUR, HIGH FRUCTOSE CORN SYRUP [WITH SULFUR DIOXIDE], CONTAINS 2% OR LESS OF EACH OF THE FOLLOWING: YEAST, WHEAT GLUTEN, SOYBEAN OIL, SALT, SODIUM STEAROYL LACTYLATE, ETHOXYLATED MONO- AND DIGLYCERIDES, MONOGLYCERIDES, CALCIUM SULFATE, CALCIUM PEROXIDE, SOY LECITHIN, ENZYMES, CALCIUM CARBONATE, AMMONIUM SULFATE, CALCIUM PROPIONATE [TO PRESERVE FRESHNESS]), LETTUCE, MAYONNAISE (SOYBEAN OIL, WATER, WHOLE EGGS AND EGG YOLKS, VINEGAR, SALT, SUGAR, LEMON JUICE, CALCIUM DISODIUM EDTA [USED TO PROTECT QUALITY], NATURAL FLAVORS), SOUR CREAM (CULTURED PASTEURIZED GRADE A CREAM, NON FAT MILK SOLIDS, ENZYME), DILL RELISH (CURED CUCUMBERS, WATER, VINEGAR, SALT, XANTHAN GUM, NATURAL FLAVORINGS, POLYSORBATE 80, AND TURMERIC), CELERY, GREEN ONION, WORCESTERSHIRE SAUCE (WATER, HIGH FRUCTOSE CORN SYRUP, MOLASSES, SALT, ACETIC ACID, CARAMEL COLOR, HYDROLYZED SOY PROTEIN, WHEAT FLOUR [NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID], NATURAL FLAVOR, GUAR GUM, AND BENZOATE OF SODA), CELERY SALT (SALT AND CELERY SEED), BLACK PEPPER.