Which of these popular food products was originally marketed as a medicinal product before becoming a mainstream beverage or food item?

Throughout culinary history, some of the most successful food products weren't initially marketed as we know them today. Companies have had to pivot their marketing strategies dramatically to find the right audience or use case. This poll tests your knowledge of these fascinating product marketing transformations in the food industry - can you identify which famous food item underwent a complete marketing reinvention?

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Coca-Cola (initially sold as a medicinal syrup to relieve headaches and fatigue)
Oreo cookies (originally marketed as doctor-recommended digestive biscuits for children)
Heinz Ketchup (first sold as a cure for intestinal disorders before becoming a condiment)
M&M's (developed as vitamin supplements for soldiers before becoming candy)