Some diabetic snacks that contain no or very few carbohydrates include string cheese, olives and hard-boiled eggs, states the American Diabetes Association. Some fruits and vegetables have low amounts of carbohydrates when eaten in a single-portion size, such as celery, avocado, blueberries and cherry tomatoes.
There are many snacks that have fewer than 5 grams of carbohydrates per portion, such as five baby carrots, explains the American Diabetes Association. A diabetic can eat 1 cup of cucumber slices and dip them in 1 tablespoon of ranch dressing to stay under the 5 grams. Cherry tomatoes can be substituted for the cucumbers for another healthy snack. Three celery sticks and 1 tablespoon of peanut butter makes another healthy alternative with less than 5 grams of carbohydrates. Seeds and nuts are healthy snacks and low in carbohydrates per portion, such as 15 almonds.
There are more healthy snacks that only contain between 10 and 20 grams of carbohydrates, according to the American Diabetes Association. For instance, a 1/4 cup of nuts mixed with dried fruit contains few carbohydrates and is a filling snack. Broth-based soups are also healthy for diabetics. A small apple or orange contains enough healthy fiber to offset the carbohydrates. Vegetables such as broccoli, celery and carrots can be dipped in hummus for a snack, as well.