Beef and pork contain no sugar, according to SF Gate. Poultry is another food item that has no sugar or starches. Seafood and eggs do not contain sugar.
Beef and pork contain no carbohydrates and are high in protein. Cutting away excess fat before cooking or choosing leaner meats reduces the amount of saturated fats in meat. Poultry is another protein source, and skinless, light chicken has a low amount of saturated fat when compared to dark meat with skin. Turkey and chicken have less than 1 gram of saturated fat for each 3-ounce serving.
Shrimp, sardines and tuna are positive sources of protein. Shrimp plays a key role in weight loss by increasing leptin levels in the body. Leptin is a hormone that regulates the body's energy levels and appetite. Shellfish and oysters contain a small amount of carbohydrates, but they are sugar free. Fish have omega-3 fats that decrease the risk of heart disease and lower triglycerides in the blood.
Most of the protein in eggs is concentrated in the egg whites, and egg whites have no cholesterol or fat. According to SF Gate, adults should only eat four egg yolks each week. Eggs are high in choline, a nutrient that may decrease the risk of breast cancer in women. Eggs contain zeaxanthin and lutein, antioxidants that prevent muscular degeneration.