What Is Circadian Rhythm — And Why Does It Matter for Your Health?
Your body runs on rhythm, not willpower. Circadian rhythm is your internal 24-hour clock that impacts sleep, hormones, metabolism, immunity, and healthy aging. Here’s how it works and why it matters. Your Body Has a Built-In 24-Hour Clock Circadian rhythm is your body’s internal timing system — a roughly 24-hour cycle that regulates nearly every biological process, including cortisol, melatonin, metabolism, digestion, body temperature, and sleep. Unlike sleep alone, this rhythm coordinates the entire body. When it's aligned, your body becomes more efficient, calmer, hormonally balanced, and better at cellular repair and recovery — all central to healthy aging and extended lifespan. For our ancestors, this alignment happened naturally because they lived by the sun. Their days started at sunrise, ended at sunset, and nights were spent in complete...
