540 calories. According to the study abroad network around Russia, the calorie of Russian princess fruit tea is 540 calories. Among the raw materials of Russian princess black tea, tea is rich in tea polyphenols, which has the effects of antioxidation, lipid lowering and blood pressure lowering. Adding rose petals and dried blackcurrant can increase the nutritional value of tea. In addition, theanine in black tea can improve people's nervous system, while tannic acid can help digestion and antibacterial.