Linked from
The 38 pages that link to Capsaicin, each with the reason it gives.
Scoville scaleBroader topic: It is the principal compound behind the heat the scale represents.
SpiceBroader topic: It creates chili heat, a sensation distinct from aroma and basic tastes.
CapsaicinoidBroader topic: It is the principal example of how this compound group activates TRPV1.
TadkaBroader topic: Frying chili in fat disperses its capsaicin through the dish.
Chili sauceBroader topic: Its concentration helps determine how intensely a chili sauce feels hot.
PungencyBroader topic: It produces chili heat without raising the temperature of the food.