Which food has less impact on blood sugar?

SOURDOUGH BREAD (ENRICHED UNBLEACHED WHEAT FLOUR [WHEAT FLOUR, MALTED BARLEY FLOUR, NIACIN, REDUCED IRON, THIAMIN MONONITRATE, RIBOFLAVIN AND FOLIC ACID], WATER, YEAST, HIGH FRUCTOSE CORN SYRUP, VEGETABLE OIL [CANOLA AND/OR SOY OIL], CONTAINS 2% OR LESS OF THE FOLLOWING: SALT, YEAST NUTRIENT [AMMONIUM SULFATE], DOUGH CONDITIONERS [SODIUM STEAROYL LACTYLATE, ASCORBIC ACID, MONOCALCIUM PHOSPHATE], EXTRACT OF MALTED BARLEY, DEXTROSE, FUMARIC ACID, SODIUM DIACETATE, LACTIC ACID, SILICON DIOXIDE, CALCIUM PROPIONATE [MOLD INHIBITOR], CALCIUM SULFATE, ENZYMES, NONFAT DRY MILK, SOY FLOUR), ROASTED TURKEY (TURKEY BREAST AND WHITE TURKEY, TURKEY BROTH, CONTAINS LESS THAN 2% OF SALT, VINEGAR, MODIFIED FOOD STARCH, CARRAGEENAN, SODIUM PHOSPHATE, DEXTROSE), PEPPER JACK CHEESE (PASTEURIZED MILK, RED AND GREEN JALAPENO PEPPERS, CHEESE CULTURES, SALT AND ENZYMES)., MARGARINE (SOYBEAN OIL, PALM OIL, WATER, SALT, CONTAINS LESS THAN 2% OF SOY LECITHIN, POTASSIUM, SORBATE [A PRESERVATIVE], VEGETABLE MONO & DIGLYCERIDES, CITRIC ACID, NATURAL & ARTIFICIAL FLAVOR BETA CAROTENE [COLOR], VITAMIN A PALMATE ADDED, WHEY).