Stepping off a plane into the sweltering, humid air of Bangkok, Manaus, or Chennai feels less like entering a city and more like walking into the mouth of a living animal. The air is thick enough to chew, the sun behaves like a physical weight pressing down on your collarbones, and within forty seconds, your shirt is glued to your spine. Your initial instinct is simple: your body has entered a state of emergency. For the first few days, you feel sluggish, heavy, and strangely uninterested in food. You wonder how eight million people around you are casually walking in denim while your internal engine feels like an overclocked laptop on the verge of melting its own motherboard. And inevitably, as the weeks stretch into months, a deeper question settles in: is this relentless environment changing me? Not just making me sweat more, but fundamentally, permanently altering the biochemical machinery that converts food into fuel? The short answer is nuanced: your metabolism changes ...
Whenever we hear the word "iron," we usually think of cars, nails, or heavy machines. But have you ever thought that iron is inside your own body too? Yes, it sounds strange, but it is completely true. Where does the iron in our body come from? It comes from the food we eat, like spinach, eggs, meat, lentils, and beetroot. This iron mixes into our blood, and our body stores it inside our blood cells. How much iron is in our body? An average human body contains about 3 to 4 grams of iron. This may sound like very little, but scientists say that if you collected it all together, it could make a small nail—about 5 to 7 centimeters long. Why does our body need iron? Iron does very important work in our body: Carrying oxygen in the blood: There is a substance in our blood called "hemoglobin." Iron is inside this hemoglobin, and it carries oxygen from our lungs to every part of our body. Making energy: Iron helps our body turn food into energy so we can stay act...