"Water-soluble" refers to substances that can dissolve in water. When a water-soluble substance is mixed with water, it breaks down into smaller particles, allowing it to spread evenly throughout the liquid. Common examples of water-soluble substances include salt, sugar, and certain vitamins like vitamin C. This property is important in many everyday situations. For instance, when you stir sugar into your tea, it dissolves, making the drink sweeter. In the body, water-soluble vitamins are easily absorbed and transported in the bloodstream, helping to support various functions and overall health.