Blueberries are rich in nutrients and are often regarded as a “superfood,” yet many consumers remain concerned about pesticide residues and how to wash them properly. According to Dr. Liu Bor-Jen's Facebook page, patients have recently asked how blueberries should be cleaned to ensure food safety.

Dr. Liu noted that every 100 grams of blueberries contain anthocyanins and polyphenols with antioxidant and anti-inflammatory properties, along with dietary fiber, vitamin C, vitamin K, and manganese, which support gut health, immunity, and metabolism. A 2024 review study summarizing clinical and basic research on blueberries found strong evidence supporting cardiovascular benefits, including lowered blood pressure, improved vascular function, and reduced chronic inflammation, especially for individuals with hypertension or metabolic syndrome.

The study also indicated that blueberries and anthocyanins may help stabilize postprandial blood glucose and improve insulin sensitivity, making them useful for people with prediabetes. In addition, blueberries may support memory and reduce oxidative stress, while interactions between anthocyanins and gut microbiota may contribute to better intestinal and immune health.

Regarding pesticide concerns, Dr. Liu explained that based on recent inspection data in Taiwan, blueberries are not considered a high-risk fruit. As long as proper washing methods are used, potential risks can be significantly reduced. Long soaking in salt water or baking soda is no longer recommended; rinsing under running water for 30 to 60 seconds with gentle rubbing before consumption is currently considered the safest and most effective method.