The Curious Core on Instagram: "When Coca-Cola’s phosphoric acid meets the casein protein in milk, it causes the protein to curdle and separate. This reaction forms a thick, clumpy substance that shows just how differently your body processes the two drinks. While this reaction itself isn’t dangerous in small amounts, it’s a clear demonstration of why mixing Coke and milk isn’t a good idea. The combination can lead to indigestion, bloating, and discomfort, especially for people with sensitive st