Khaberni - Wild blueberries (blueberries) are considered one of the best and finest types of fruits that nutrition and diet experts recommend to consume regularly, as it contains low calories (only 80 calories in just one small cup), thus it has a low glycemic index and does not cause an increase in blood sugar levels after consumption, therefore it is good for diabetics.
Blueberry has key ingredients that enhance its nutritional status, as it is low in fat and rich in fiber and phenols that improve the level of immune functions in the body, and increase the efficiency of the digestive system linked to enhancing metabolic processes and the subsequent health effects that positively reflect on the body.
What distinguishes blueberries?
The credit for the treasure that a blueberry represents is due to its high content of dietary fiber and multiple phenols, specifically anthocyanins, which give it its blue color.
The multiple phenols are distinguished by their large molecular size, which makes it difficult to break down in the stomach and intestines, rushing towards the colon where it transforms into another set of outputs that the body can benefit from to support heart and vascular health, and metabolic processes.
The harsh upbringing secret to its success
The high nutritional value that blueberries acquire is attributed to the harsh conditions they grow in, having originated thousands of years ago in Eastern Canada and the state of Maine, USA. Blueberries in these regions experience a harsh winter that forces them to adapt by producing anthocyanin compounds (one of the phenols) that protect them against these conditions. They also contain 30 different types of anthocyanins, thereby we gain these protective benefits when we consume blueberries that have resisted and managed to grow and survive under those conditions.
Benefits of blueberries for the heart
A scientific review suggests that regular consumption of blueberries may contribute to supporting heart health and improving metabolic processes in the body. This is due to its positive impact on a number of important biomarkers, like blood pressure, blood sugar levels, vascular functions, and blood lipid levels.
These results were included in a scientific analysis that covered 12 studies conducted over 24 years in several countries, overseen by a team of international researchers. The study, published in 2026 in the journal Critical Reviews in Food Science and Nutrition, reviewed a large number of clinical studies on the benefits of blueberries, with the aim of providing a scientific basis supporting the recommendations for their consumption.
The study confirmed in its findings that blueberries improve the ability of arteries to perform their functions as a result of their effect on endothelial cells of arteries and generally on blood vessels.
It is noteworthy that obtaining such stunning results may take just a few hours after consuming a handful (one portion) of blueberries, while continuous consumption for weeks and perhaps months may be required before a person reaps the benefits of blueberries on the health of their arteries and veins, according to other studies included in the published review.
Fats and cholesterol
The results also showed a decrease in high levels of triglycerides and cholesterol, blood glucose, and low-density lipoprotein (LDL) after consuming blueberries for weeks, supporting previous results that directed people towards consuming blueberries for such cases.
However, it is pointed out that the nature of the diet each person follows, the medications they take, and their general health condition, based on which the effect and expected results may vary, must be taken into consideration.
Food for gut bacteria
The colon absorbs the larger part of the fiber and multiple phenols contained in blueberries, while the small intestine takes only about 5% to 10%, which is then captured by the beneficial bacteria in the colon upon their arrival there to convert them into metabolites (metabolic outputs) that enter the bloodstream and begin their journey in conferring additional benefits to the body.
That same scientific review listed results indicating that consuming 25 grams of freeze-dried blueberries stimulated the proliferation of a chain of beneficial bacteria that reside in the colon, known as Bifidobacterium, known for its enhanced effect on many functions in the body, and it is listed as one of the safe probiotic agents that is now added to some functional foods to enhance gut health.
Blueberries enhance memory and concentration
Some of the studies reviewed also highlighted the role of blueberries, which extended to include brain health and related aspects, such as cognitive performance and memory. Researchers attributed this effect to the ability of blueberries to improve blood circulation by raising the efficiency of arteries and veins, thus allowing blood to reach the brain with higher efficiency.
These results came after observing the mental improvement in brain performance in a group of elderly people after consuming one serving of blueberries, while others reaped the benefits after consuming them for a longer period and continuously.
The recommended amount
Blueberries can be consumed fresh, dried, or frozen, either alone or added to other foods such as salads, juices, oatmeal, and yogurt (curdled milk), or as part of a morning cereal meal, and it is advisable to consume it regularly for weeks or months to obtain the desired health benefits, equivalent to one cup daily.
It is noted that frozen blueberries retain their nutritional value and do not lose it as is commonly believed, rather its nutritional value may not be less than that of fresh blueberries available in the markets. According to the U.S. Food and Drug Administration (FDA), it helps that blueberries contain less water compared to other types of berries, as they are stored frozen within 24 hours of picking, thus their taste and nutritional value have reached their peak.
