👉 Seasonal fluid, also known as bradykinin, is a type of vasodilator that plays a crucial role in regulating blood pressure and fluid balance, but its levels fluctuate significantly with the seasons. In warmer months, increased physical activity and heat exposure can lead to higher production of bradykinin, causing blood vessels to dilate and potentially lowering blood pressure. Conversely, during colder months, reduced physical activity and a tendency to huddle indoors can decrease bradykinin levels, leading to vasoconstriction and higher blood pressure. This seasonal variation helps the body adapt to changing environmental conditions, maintaining homeostasis and ensuring proper circulatory function throughout the year.