What is the nutritional value of a blackberry

Blackberries look simple in a bowl, but the nutritional value of a blackberry is actually pretty powerful. When we ask what is the nutritional value of a blackberry, we are talking about more than just calories. Blackberries bring fiber, vitamins, minerals, and a wide mix of antioxidants that support heart health, gut health, and even blood sugar balance.

Nutrition at a glance

Below is an overview of the approximate nutritional value of blackberries per 1 cup of raw berries, about 144 grams. Values can change slightly based on ripeness and growing conditions, but this gives a clear starting point.

Serving size reference

For most nutrition labels and diet plans, a standard serving of blackberries is 1 cup of fresh berries. That is roughly a handful and a half for many adults, about 15 to 16 large berries. If you buy a small clamshell container at a U.S. grocery store, that package is usually close to 6 ounces, which is around 1.25 to 1.5 cups of blackberries.

Frozen blackberries often list serving size as 140 to 150 grams on the back label. Nutritionally, frozen and fresh are pretty similar as long as there is no added sugar.

Calorie content

One of the reasons many health focused people reach for berries is the low calorie density. One full cup of blackberries gives about 62 calories. For the volume of food you get, this is very modest.

You can fill half a breakfast bowl with blackberries, add plain Greek yogurt, and still stay in a calorie range that works for weight maintence or slow, steady fat loss. For people who track macros and feel hungry on lower calorie plans, blackberries help stretch meals without pushing energy intake to high.

Macronutrient breakdown

Carbohydrates

Blackberries contain around 13.8 grams of total carbohydrates per cup. For a fruit, that is on the lower side. Bananas or grapes, for example, have far more carbs per serving.

Most of these carbs come from natural sugars and fiber. Because the carb load is gentle and packed with fiber, many people with blood sugar concerns still include small portions of blackberries in a balanced meal.

Fiber content

Fiber is where the nutritional value of a blackberry really stand out. One cup holds around 7.6 grams of fiber, which is more than 25 percent of the daily fiber goal many experts recommend for adults.

This fiber helps in several ways:

• Slows digestion, which can support stable blood sugar response.
• Feeds healthy gut bacteria, which may support immune and digestive health.
• Supports bowel regularity and may reduce constipation.

For anyone in the U.S. trying to increase fiber intake without jumping to bran cereals or fiber bars, just adding a cup of blackberries to the day can be a pretty easy and tasty win.

Sugars natural vs added

Nearly all of the 7 grams of sugar in a cup of blackberries are natural fruit sugar, mainly fructose and glucose. There is no added sugar in plain fresh or frozen berries.

Be careful with blackberry jams, syrups, and sweetened yogurts, because those products often contain a high amount of added sugar. The health effect of blackberries changes a alot once they are cooked down with table sugar into a dessert topping.

Protein content

Blackberries provide around 2 grams of protein per cup. That is not enough to count them as a protein food, but it still supports total daily intake in a small way.

Pairing blackberries with protein rich foods improves the overall balance of a meal. For example, Greek yogurt, cottage cheese, chia pudding, or a small portion of nuts combine well with berries to build a more filling snack.

Fat content

Blackberries are naturally low in fat, with about 0.7 grams per cup. Most of this is unsaturated fat in very small amounts. There is effectively zero saturated and no trans fat in plain berries.

That low fat profile makes blackberries a good fit for people focusing on heart health or managing gallbladder issues, where high fat meals can cause discomfort. To help absorb fat soluble vitamins from other foods in the same meal, you can add a source of healthy fat such as nuts, seeds, or avocado.

Saturated fat

Saturated fat content in blackberries is very close to 0 grams. Any tiny amount present has no real practical impact on daily saturated fat intake.

Trans fat

There is no natural trans fat in blackberries. Any product that lists “blackberry flavor” but also shows trans fat would be a highly processed food, not whole berries.

Vitamins in blackberries

When people ask what is the nutritional value of a blackberry, we should talk clearly about the vitamin profile. These small dark berries are especially high in vitamin C and vitamin K, with useful amounts of several B vitamins and vitamin A compounds.

Vitamin C: Around 30 mg per cup gives roughly half of the daily value. Vitamin C supports collagen production for skin and joint health, plays a key role in immune function, and acts as an antioxidant. Many of us reach for orange juice when sick, but a bowl of blackberries can do similar work with less sugar.

Vitamin K: At about 28.5 mcg per cup, blackberries are a strong source of vitamin K, which is important for normal blood clotting and bone health. People on blood thinning medication like warfarin need to keep vitamin K intake consistent, so it is wise to talk with a health care provider about portions if that applies.

Folate and other B vitamins: Blackberries provide roughly 36 mcg of folate along with small amounts of niacin, riboflavin, and vitamin B6. Folate supports cell growth, red blood cell formation, and is especially key during pregnancy.

Vitamin A related compounds: The dark purple color of blackberries comes from plant compounds that work alongside vitamin A in the body, supporting eye health and possibly protecting cells from oxidative stress.

Minerals in blackberries

Blackberries do not match meat or legumes for minerals, but they still play a helpful role, especially for magnesium, potassium, and calcium.

Potassium: With about 233 mg per cup, blackberries contribute to daily potassium goals that support healthy blood pressure, fluid balance, and nerve signaling. Many Americans fall short on potassium, often eating more salty processed foods than whole fruits and vegetables.

Magnesium: Around 29 mg of magnesium per cup helps support muscle function, nerve function, and energy production at the cellular level. For people who get leg cramps or feel tense, improving magnesium through foods like blackberries, leafy greens, and nuts can make a difference over time.

Calcium and iron: Blackberries give modest amounts of calcium (around 42 mg) and iron (about 0.9 mg). While they are not primary sources, they add to the total intake when combined with other foods.

Sodium content

Fresh and frozen blackberries are naturally very low in sodium, with about 1 mg per cup. This makes them safe and useful for low sodium eating patterns, such as DASH or heart healthy diets.

Cholesterol content

Blackberries contain no cholesterol because they are a plant food. For people working on lowering LDL cholesterol, fruits like blackberries often fit easily into a heart friendly eating pattern alongside oats, beans, nuts, and fatty fish.

Glycemic impact and blood sugar notes

Despite their natural sugar content, blackberries tend to have a fairly low glycemic impact. The high fiber content slows the release of sugar into the bloodstream, which can help prevent rapid spikes and crashes.

For people with prediabetes or type 2 diabetes, small to moderate portions of blackberries can often be included, especially when combined with protein and healthy fat. For example, half a cup of blackberries with plain yogurt and a few walnuts is much kinder to blood sugar than a glass of juice or a pastry.

Digestive considerations

The same seeds and skins that give blackberries their great texture can feel rough for some digestive systems. The 7.6 grams of fiber are great for many people but may be too much at once for others, especially anyone who is not used to high fiber meals.

Some people notice gas, bloating, or loose stools if they suddenly eat several cups of blackberries in one day. A slow increase, such as a half cup a day at first, along with enough water, usually helps the gut adjust more smoothly.

Allergen information

Blackberry allergy is relatively rare compared with nuts, dairy, or shellfish, but it does exist. Symptoms may include itching in the mouth, hives, or, in very severe cases, trouble breathing.

Anyone with a known allergy to other berries or to plants in the Rosaceae family should be cautious and talk to an allergist if they suspect a reaction. For most people, though, blackberries are a safe and gentle fruit option.

Antinutrients or absorption notes

Blackberries contain some natural plant acids and tannins, which can bind to minerals like iron and reduce absorption slightly. In a balanced diet, this effect is modest and not usually a concern.

Pairing blackberries with vitamin C rich foods or iron rich sources like beans and leafy greens can actually help iron absorption overall, since the vitamin C effect often outweigh the mild binding from tannins.

Health considerations

The nutritional value of a blackberry goes beyond basic numbers on a label. These fruits are rich in anthocyanins and other polyphenols, plant compounds that work as antioxidants in the body. They help protect cells from oxidative stress, which is linked with aging and many chronic illnesses.

Studies on berries in general suggest possible support for heart health, brain function, and reduced markers of inflammation. Blackberries bring a strong combination of fiber and antioxidants, so they fit well into patterns focused on long term wellness.

Potential benefits

Consistent intake of blackberries as part of a varied diet may support:

• Heart health through fiber, potassium, and antioxidant content.
• Digestive health thanks to their high fiber and water content.
• Blood sugar balance when used instead of higher sugar desserts.
• Immune function with strong vitamin C levels.
• Bone and blood health through vitamin K and small amounts of calcium and magnesium.

Potential concerns or limitations

While blackberries are nutrient rich, there are a few small cautions:

People with irritable bowel syndrome or very sensitive digestion may react to the seeds and high fiber. In those cases, blending blackberries into a smoothie and straining the seeds, or using smaller portions, can sometimes be more comfortable.

Those on warfarin or similar blood thinning drugs need steady vitamin K intake. If someone suddenly increases blackberry intake from almost none to several cups daily, it may affect their medication response. A stable pattern and close follow up with a health care team is the safer route.

Portion size guidance

For most generally healthy adults, 1 cup of blackberries once a day fits nicely into a balanced eating pattern. For children, a half cup portion is usually plenty, adjusted for appetite.

People with diabetes or anyone using a strict low carb plan might choose 1/2 cup at a time, paired with protein and fat to soften the blood sugar effect. What matters is the total context of the meal and the full day, not just one serving by itself.

Frequency of consumption

Unlike heavy desserts or fried foods, blackberries can be eaten daily for many people. Rotating them with other berries like blueberries, raspberries, and strawberries gives a wider range of plant compounds and makes meals more interesting.

Raw vs cooked blackberries

Raw blackberries hold the most vitamin C, since this vitamin is sensitive to heat. Light cooking, such as simmering in oatmeal or briefly warming in a pan, will lower vitamin C some but often keeps most of the fiber and many of the antioxidants.

Slow baking with a lot of added sugar, like in pies or cobblers, changes the health profile. The fruit is still there, but the total sugar and calories increase. For people watching weight or blood sugar, fresh or lightly cooked blackberries with no added sugar are usually the better pick.

Fresh vs frozen vs canned blackberries

Fresh blackberries in season often taste sweetest and have the best texture. Frozen blackberries are usually picked and frozen quickly, so nutrient levels often stay very close to fresh. Frozen berries are a smart budget friendly choice in the U.S., especially outside the summer months.

Canned blackberries in syrup often contain a lot of added sugar. If you buy canned, look for versions packed in water or fruit juice instead of heavy syrup and rinse them gently before using to lower the sugar content more.

Cultural and traditional uses

In many parts of the United States, blackberries feel like a summer memory. They show up in pies at family gatherings, homemade jams, and simple bowls of berries and cream. In folk traditions, blackberry leaf teas and syrups were used for sore throats and mild digestive upset.

Different cultures use blackberries in sauces for meat, refreshing beverages, and even fermented drinks. However they are served, the basic nutritional value of a blackberry remains rooted in fiber, vitamins, and phytonutrients.

How blackberries fit into a balanced diet

Blackberries fit smoothly into many eating patterns: Mediterranean, flexitarian, vegetarian, and even well planned low carb plans. They are naturally gluten free, dairy free, and suitable for most lifestyles.

We can use them as a nutrient dense carbohydrate source alongside lean protein and healthy fat. For example, grilled chicken, a big salad with olive oil, and a side of blackberries for dessert creates a plate that feels satisfying without feeling heavy.

Pairing suggestions

Practical ways to include blackberries in daily meals include:

• Stirring them into plain oatmeal with a sprinkle of cinnamon.
• Mixing with Greek yogurt and a spoon of chia seeds for a high fiber snack.
• Adding to leafy green salads with goat cheese and toasted walnuts.
• Blending into smoothies with spinach and unsweetened almond milk.
• Using as a topping on whole grain waffles or pancakes instead of syrup.

Storage and shelf life notes

Fresh blackberries are delicate. Once you bring them home, store them in the fridge, unwashed, in their original container or a breathable container. They usually last 2 to 4 days before they start to soften or mold.

Wash blackberries right before eating, not in advance, because extra moisture speeds spoilage. Frozen blackberries stay safe for months in the freezer and are handy for smoothies, baked oatmeal, and sauces.

Comparison with similar fruits

Compared with strawberries or blueberries, blackberries tend to have slightly more fiber and a similar or slightly lower calorie content per cup. Compared with grapes or tropical fruits like mango, they have fewer total sugars and a gentler impact on blood sugar.

If someone enjoys mixed berries, keeping blackberries in the rotation adds texture and extra fiber that supports fullness and digestive health.

Frequently asked questions about the nutritional value of a blackberry

Are blackberries good for weight loss

Blackberries can support weight loss efforts because they are low in calories, very high in fiber, and naturally sweet. They help satisfy a sweet tooth while giving volume and nutrients instead of just sugar.

Are blackberries keto friendly

Strict keto diets limit carbs a lot, but small portions of blackberries can sometimes fit. A quarter to half cup paired with high fat yogurt, cream, or nuts is a common combo for people using a low carb or keto approach.

Is the sugar in blackberries bad for blood sugar

The sugar in blackberries is natural and packaged with fiber and water. For many people, this leads to a milder blood sugar rise compared with refined sweets. However, those with diabetes should still count the carbs and adjust portion sizes based on their plan and blood sugar response.

Can kids eat blackberries everyday

Most children can enjoy blackberries daily in reasonable portions, such as a half cup. Always watch for choking in very young kids and cut the berries in smaller pieces if needed. The seeds are usually fine, but if a child has digestive issues, start with small amounts and see how they feel.

Nutrition data source note and update

The nutrition numbers in this article are based mainly on standard databases such as the USDA FoodData Central along with clinical practice experience using blackberry portions in meal plans. Exact values can vary slightly by brand, soil, ripeness, and growing region, so food labels on packaged products may list small diferences.

Last reviewed and updated for accuracy and clarity: June 2026. As research on berries and health continues to grow, we keep refining how we talk about what is the nutritional value of a blackberry so readers can keep making informed, practical choices for their own table.