This course started with a specific question: what is in your blood? But the deeper question it points towards is bigger than any single test result — it is about what kind of relationship you have with your own health. In Nigeria, health is often treated reactively. You go to the hospital when something hurts. You get tested when a doctor asks for it. You think about your body when it stops working the way it should. This is understandable given the cost of healthcare, the pressure of daily life, and a cultural environment that does not always prioritise preventive medicine. But it creates a serious problem: by the time many young Nigerians know something important about their health, the moment to act on it has already passed. Taking charge of your health proactively means building a different set of habits. It means knowing your numbers — your genotype, your blood group, your blood pressure, your weight, your vision — before you need them in an emergency. It means attending routine check-ups rather than only seeking help in a crisis. It means being honest with your doctor about your symptoms, your lifestyle, and your concerns. It means advocating for yourself in a medical environment where you can sometimes be dismissed or rushed through. It also means understanding the connection between your daily choices and your long-term health. How much water you drink, how regularly you sleep, whether you exercise, what you eat, how you manage stress — none of these feel like health decisions in the moment, but they accumulate into your health over time. For young people specifically, the habits you build in your teens and early twenties shape your body's baseline for decades. The time to start is not when you are sick. It is now, while you are well, and while small changes are still easy to make. Knowing what runs in your blood is the beginning. What you do with that knowledge — and how seriously you take your own body — is the chapter you write from here.