Ever lit a candle and felt instantly relaxed? Or caught a whiff of citrus and felt a burst of energy? Scent isn’t just a nice touch—it’s a powerful tool that shapes your mood and mindset. With aromatherapy and scented candles hitting $4 billion in U.S. sales, everyone’s looking for that perfect “scent hack.” Let’s dive into the science of smell and how you can use it to boost your day.