Recently, the "top-notch fruit" blueberries have been selling well. Compared to the price, what is more eye-catching is the size of blueberries. The 12mm/14mm blueberries that I used to eat were only considered mini fruits, and the largest ones could even reach 30mm, almost catching up with cherries. Does the larger the blueberry, the more nutritious it is? Firstly, it can be confirmed that larger blueberries are not necessarily better. The main factor affecting fruit size is variety genes, which are not absolutely related to taste or nutrient density. Blueberries have a high content of anthocyanins. Blueberries are a good source of dietary fiber, vitamin K, vitamin C, and potassium in fruits, but most importantly, they have a high content of anthocyanins! Long term intake of anthocyanins has great benefits in protecting vision, regulating immunity, balancing metabolism, anti-aging, and more. Anthocyanins are currently known as potent antioxidants, with antioxidant capacity 20 times that of vitamin C and 50 times that of vitamin E. They can effectively eliminate free radicals in the body and reduce cellular oxidative damage. For people who frequently use their eyes, anthocyanins in blueberries are one of the few antioxidants that can directly reach the eyes, helping to alleviate dryness and soreness in the eyes. The phenolic substances in blueberries can assist in reducing vascular inflammation, while dietary fiber helps regulate blood lipid levels, which is very helpful for maintaining cardiovascular health. The anthocyanin content of 100 grams of blueberries is approximately between 70 milligrams and 500 milligrams. With only 10 to 20 small and medium-sized blueberries (14-16 millimeters) per day, the body can easily meet its daily needs for anthocyanins. Under the same weight, the smaller the blueberry, the higher the proportion of skin, and the more nutrients it contains. Anthocyanins are a natural pigment in plants, which are blue-green in color. Wherever the color is dark, there is abundant anthocyanin hidden. Blueberries, on the other hand, have a dark skin color and a greenish white flesh, which means that anthocyanins are mainly distributed in the skin. Assuming two blueberries of the same quality with different sizes but the same weight, the diameter of the small blueberry is 10 millimeters and the diameter of the large blueberry is 20 millimeters: under the same weight, one large blueberry is approximately 8 small blueberries, but the surface area of the skin of the large blueberry (12.56 square centimeters) is only half of that of the small blueberry (25.12 square centimeters). This means that for blueberries of the same weight, there are more blueberries and a larger area of skin to eat, resulting in a higher content of anthocyanins. Meanwhile, a 2020 study by the Journal of Agricultural and Food Chemistry on 12 blueberry varieties showed that the anthocyanin content and antioxidant capacity of small fruit blueberries were generally higher than those of large fruit blueberries. This is because plant photosynthetic products are limited, and when large fruits expand, the concentration of secondary metabolites per unit mass decreases, resulting in a decrease in nutrient density. Moreover, not only anthocyanins, but also the anti-inflammatory and antioxidant active ingredients such as polyphenols and flavonoids in blueberries are mostly found in the skin. In terms of taste, large fruit blueberries may not necessarily have an advantage. Due to their large cell volume, pectin is easily degraded, and after long-distance transportation, they are prone to a "water squishing" taste, and may even have a sour burst; Small and medium-sized blueberries have thicker skin, denser flesh, concentrated sugar, and a richer flavor. 4 tips to choose good blueberries: 1. Look at the fruit powder, which is the layer of white frost on the surface of blueberries. It is mainly composed of fructose, alcohols, and oleanolic acid, which can prevent blueberries from losing water. The more fruit powder there is, the fresher it is. When cleaning, there is no need to rub off the white frost, just rinse off the floating dust with gentle running water. Choose fruits with a uniform blue purple color and a round and full body, avoiding fruits that turn green or have dark black hair. 3. Check the navel of blueberries. Due to high sugar content, it is easy to breed mold. If you find a furry patch in the navel of blueberries, which appears white or green and has a pungent smell of alcohol, it may have spoiled and is not recommended for consumption. 4. Pinch the fruit lightly to achieve a soft and elastic texture, resulting in a better taste. If it feels soft and sticky when pinched, it may have deteriorated. If it is an online purchase, you can check the size label. Small and medium-sized fruits ranging from 14 to 16 millimeters are the most cost-effective choice. This size range takes into account taste, nutrition, and price, making it a true 'golden size'. Is it better to eat more blueberries? Anthocyanins are not necessarily better with more intake. Anthocyanins are powerful antioxidants that can protect the human body from damage caused by free radicals. But excessive anthocyanins can also hinder the absorption of minerals. People with anemia and zinc deficiency should not eat too much anthocyanins. People with poor gastrointestinal health are also not recommended to eat too many blueberries. (New Society)