Diabetics are taught to help regulate their blood sugar levels after meals by being particular about what kinds of foods they eat and by keeping a record of food items eaten, activities and blood sugar levels, says Lilly Diabetes. This record allows the diabetic to adjust a diet if necessary.
Carbohydrate-rich foods have the most dramatic effect on blood sugar levels in a diabetic, and their consumption should be monitored closely, according to Lilly Diabetes. Such items include cereal, rice, pasta, yogurt and sweets. Carbohydrates are converted to sugars for fuel in the body, and any excess sugars not consumed as a fuel in a diabetic's body causes blood sugar levels to spike drastically. A diabetic can get a sense of the amount of carbohydrates the body needs every meal by measuring blood sugar levels before and after meals and keeping a record. This allows the diabetic to discover the proper amount of carbohydrates to consume during a meal.
Keeping track of carbohydrate consumption throughout the day and recording specific activities performed allows the diabetic to gauge more precisely the rate the body burns fuel, according to Lilly Diabetes. This can be combined with analysis of the diet journal to more precisely help control blood sugar levels after meals or anytime.