Think of hard water as water that’s packed with extra minerals, mostly calcium and magnesium. It’s like water that went to a mineral spa and forgot to leave.
When this water flows through your pipes and hits your shampoo, it doesn’t lather up as nicely. Instead, it creates a kind of mineral-soap scum that clings to your hair like a stubborn fog.
So, does that scum actually make your hair greasy? The short answer is: yes, but in a sneaky way. It’s not real oil—it’s a mineral buildup that looks and feels like grease.
