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Natural Sugars in Blackberries

author image Jonae Fredericks
Jonae Fredericks started writing in 2007. She also has a background as a licensed cosmetologist and certified skin-care specialist. Jonae Fredericks is a certified paraeducator, presently working in the public education system.
Natural Sugars in Blackberries
A close-up of blackberries growing in the wild. Photo Credit: CobraCZ/iStock/Getty Images

According to the Centers for Disease Control and Prevention, American Indians were the first inhabitants to make berries part of their daily diets. Blackberries are rich in vitamin C, fiber and potassium, but they also contain sugar. However, compared to other fruits, the sugar content is quite low.

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Blackberries are not really berries at all. Florida Orienteering explains that true berries contain at least one or more seeds inside of a fleshy pulp that develops from a single ovary. Blackberries do not grow from the ovary of a flower; instead, they grow from the base of the plant. Each blackberry fruit contains a cluster of drupelets that contain one seed each. When ripe, blackberries are soft, shiny and deep black in color. Because they have a low sugar content, blackberries tend to have a tart flavor.


Blackberries contain a variety of different sugars. pal explains that 7 g of sugar are in 1 cup of blackberries. A further breakdown reveals that blackberries also have 101 mg of sucrose, 3,326 mg of glucose, 3,456 mg of fructose, 101 mg of maltose and 43.2 mg of galactose. Blackberries don't have any lactose. The final breakdown of the sugar content of blackberries equals 14.7 g of carbohydrates in 1 cup.


Carbohydrates are made of starch and sugars, which provide fuel for the body. Carbohydrates are either complex or simple. Blackberries contain simple carbohydrates, which are easily digested by the body. If you are following a low-carbohydrate diet and would like to add fruit to your daily menu, blackberries are a good choice. According to the Berry Health benefits Network, blackberries not only have a low sugar content, they are also low in calories and are fat-free.


The glucose to fructose ration in fruits determines how they affect your digestive system and intestines. Ask Dr. explains that while some fruits easily absorb into the bloodstream, others lay in the intestines fermenting and building-up gas. Blackberries rank fourth in the list of fruits that are intestine-friendly. Like white grapes, strawberries and raspberries, blackberries have a high glucose content, which assists fructose absorption into the bloodstream. The faster the fructose absorption, the less gas produced in the intestines.


When purchasing or growing blackberries, realize that the fruit goes by several different names. Marionberries are in season July through August and growers refer to these fruits as the cabernet of blackberries, developed by Oregon State University. According to Oregon State University, Evergreen blackberries are in season August through September and are native to England. Finally, boysenberry blackberries, which are California natives, have a season that runs throughout the month of July.

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