Why were spices once worth more than gold?

Before fridges existed, a pinch of clove or garlic was doing real work: keeping food from spoiling.

Many everyday spices carry antimicrobial compounds. Garlic has allicin, clove has eugenol, oregano has carvacrol, cinnamon has cinnamaldehyde. These chemicals damage the cell membranes of spoilage bacteria and slow their growth, so spiced food stays good to eat longer. That preserving power, on top of flavor, is part of why spices were once traded like treasure.

Think of how a strongly spiced pot of bo kho or curry sits out at room temperature longer before turning than plain boiled meat does.

Spices are not just flavor. Several of them actively slow the bacteria that make food go bad.

It helps explain why the spiciest cuisines grew up in the hottest climates, where unrefrigerated food spoils fastest and antimicrobial spices mattered most.

Spice = built-in bug spray for food. Garlic, clove and cinnamon fight the microbes that spoil it.

Learn the idea and practice English at the same time.