Environmental and lifestyle factors shape how your body functions day to day—from the air you breathe and light you're exposed to, to how much you move and sleep. This category covers the science behind these everyday exposures and habits: what research shows about their effects on your health, how they interact with nutrition and genetics, and where the evidence is still developing. You'll find explanations of mechanisms (why sunlight affects mood, how air quality influences breathing) alongside what studies actually demonstrate versus what remains unclear.
The articles here answer practical questions: How does sleep deprivation affect metabolism? What does research say about blue light and circadian rhythms? How do temperature and humidity influence physical performance? Which environmental stressors have the strongest evidence behind them, and which claims need more study? You'll learn to distinguish between established effects and emerging areas where scientists are still gathering data.