Скачать или смотреть What is a Calorie, Really

Food acts as chemical potential energy stored within molecular bonds, serving as the essential fuel that powers motion, heat, and life itself. This energy is essentially recycled solar energy, originally captured by plants through photosynthesis and stored in carbohydrates, proteins, and energy-dense fats. Through the process of cellular respiration, your cells gradually release this stored energy and capture it in ATP to drive muscle fibers and nerve signals. Following the conservation of energy, your body converts these calories into motion and heat, while storing any excess as fat reserves for later use. You are essentially a biological engine running on stored sunlight, where every calorie represents a package of energy released to sustain your life.