辣椒為什麼吃起來會覺得「辣」？ 辣椒中的哪種化學物質會與我們舌頭上的熱覺受器（TRPV1）結合，產生灼熱感？ Why do chili peppers taste "spicy"? Which chemical substance in chili peppers binds to the heat receptors (TRPV1) on our tongue to create a burning sensation?
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辣椒素 / Capsaicin 辣椒素是一種強效的生物鹼，會欺騙大腦讓身體誤以為正受到高溫刺激，因而產生灼熱的辣感。 Capsaicin is a potent alkaloid that tricks the brain into thinking the body is experiencing high heat, producing a burning spicy sensation.