Each 100g serving delivers 5g of fiber (18% DV), which adds bulk to stool and feeds beneficial gut bacteria. This can prevent constipation and support a healthy microbiome, but a sudden increase may cause bloating or gas.
The 5g fiber slows sugar absorption, blunting post-meal glucose spikes despite the 10.7g sugar content. However, eating large portions can still raise blood sugar, especially if you're insulin-resistant.
Blackberries are rich in anthocyanins and polyphenols, which neutralize free radicals and reduce oxidative stress. This may lower inflammation and support cardiovascular health, though the exact clinical impact depends on your overall diet.
At 268 calories per 100g, blackberries are calorie-dense for a fruit. The fiber promotes satiety, helping you feel full longer, but overeating can lead to a calorie surplus. Stick to a 100g serving to keep calories in check.
Verdict
Eating 100g of frozen unsweetened blackberries daily is a healthy habit for most people, providing fiber and antioxidants. Just keep portions moderate to manage calories and sugar.
⚠️ Who Should Avoid
- People with irritable bowel syndrome (IBS) sensitive to high-fiber foods
- Individuals with diabetes or prediabetes who need strict carbohydrate control