Can blueberries and grapefruit be eaten together?
Generally speaking, blueberries and pomelos can be consumed together, but moderation is advised. A detailed analysis is as follows:

Blueberries are fruits rich in vitamin C, vitamin K, manganese, and antioxidant substances. Antioxidants such as anthocyanins play a significant role in protecting eye health, preventing cardiovascular diseases, and delaying aging. Pomelos also contain abundant vitamin C, dietary fiber, potassium, folic acid, and various bioactive substances. The vitamin C in pomelos helps enhance immunity, while dietary fiber aids in promoting intestinal motility and preventing constipation.
Both blueberries and pomelos are rich in antioxidants. When consumed together, their antioxidant capacity can be further enhanced, helping to remove free radicals in the body and protect cellular health. The dietary fiber in pomelos and pectin in blueberries help promote intestinal motility and improve digestive function. Both fruits are also rich in nutrients like vitamin C, which helps strengthen immunity and improve the body's resistance.
However, it is important to consume them in moderation, as excessive intake may cause gastrointestinal discomfort or interfere with the absorption of other nutrients. It is recommended to emphasize dietary diversity and balance in daily meals, avoiding excessive intake of any single food or nutrient.
References:
[1] Pan Meihua, Cheng Zhehao. Research Progress on the Nutritional Components and Health Functions of Blueberries [J]. China Food Safety, 2022, (22): 107-109.
[2] Li Liang, Zhu Hanbin, Li Changbin, et al. Study on the Nutritional Components and Health Benefits of Pomelo [J]. Modern Food, 2020, (24): 45-47.