Research has identified up to 15 types of anthocyanins in blueberries. Their rich anthocyanin content helps slow vision deterioration, while abundant carotenoids improve blurred vision. Thus, blueberries are hailed as "eye-protecting treasures," even serving as ingredients in some eye care medications.
Antioxidant Properties
Beyond their potent antioxidant anthocyanins, blueberries are rich in superoxide dismutase (SOD), an enzyme that scavenges free radicals and combats oxidative stress. This compound is commonly added to cosmetics.
Constipation Relief
Blueberries are also rich in pectin, a high-molecular-weight polymer that helps relieve constipation and regulate gut microbiota. Per 100g, blueberries contain 1-3 times more pectin than apples.
Abundant Vitamin C
The vitamin C in blueberries protects blood vessels, brightens skin, and provides antioxidant benefits.
Abundant minerals
Blueberries contain rich amounts of iron, zinc, calcium, magnesium, and copper. Each gram of blueberries contains over 81 milligrams of zinc, which helps protect nerve cells. It also strengthens bones and prevents osteoporosis. Additionally, blueberries aid in preventing cystitis, enhancing brain vitality, weight loss, and regulating blood sugar.
How to Identify Authentic Blueberries
Given their high nutritional value and price, counterfeit blueberry products are common.
1. Choose Fresh Blueberries
Products like blueberry jam, juice, or dried berries are prone to adulteration—such as using artificial colors and flavors, or substituting other juices with dyes.Adhering to healthy dietary principles, it's recommended to consume fresh blueberries.
2. Inspect Appearance
Even fresh blueberries have substitutes—many merchants use blackcurrants instead. Blueberries are rounder, with thin skins and thick flesh, small seeds that are easy to chew, and typically lack stems. Blackcurrants, however, are usually oval-shaped with thick skins and hard seeds.
3. Check Price
Blueberries cost 2-3 times more than blackcurrants. If you find "inexpensive yet high-quality" blueberries, be cautious.
4. Examine Texture
Authentic blueberries have a firm, slightly tart texture. Counterfeit products may feel mushy or overly sweet.
5. Look for Seeds
Genuine blueberries contain small, easily chewable seeds. Counterfeits often have larger, harder seeds or no seeds at all.
6. Check Packaging
Authentic blueberries come in airtight containers with clear labels. Counterfeit products may have loose packaging or unclear labeling.
3. Check the price
Blueberries cost 2-3 times more than blackcurrants. If you find "inexpensive yet high-quality" blueberries, be wary.