What does the Scoville Heat Unit (SHU) scale measure?

• A. Pepper color
• B. Pepper aroma
• C. Heat properties (burning sensation)
• D. Pepper density

Answer: (C)

Heat intensity is what the Scoville scale quantifies. It reflects how hot a pepper tastes when eaten—the burning sensation produced mainly by capsaicinoids like capsaicin. Higher SHU means a stronger perceived heat. Historically, peppers were diluted in sugar water until tasters could just detect the heat, so higher dilution (higher SHU) means more heat. Today, chemical tests measure capsaicinoid content, but the idea remains: SHU measures perceived heat, not how a pepper looks, smells, or feels in texture. For context, mild peppers sit at low SHU, while extremely hot varieties push into the hundreds of thousands or millions, showing the direct link between capsaicinoids and the burning sensation.