Linked from
The 7 pages that link to Capsaicinoid, each with the reason it gives.
CapsaicinNarrower topic: Capsaicin is the most prominent member of this chemical family.
Capsicum annuumRelated: Their amounts help determine the heat differences among C. annuum cultivars.
PungencyNarrower topic: Capsaicinoid concentration is a major chemical basis for chili pungency.
Carolina ReaperBroader topic: These compounds collectively determine the Reaper’s measured pungency.