If your hair feels perpetually dry, coarse, or frizzy even after using expensive shampoos and conditioners, the problem might lie in your water supply rather than your products. Hard water, which contains high levels of calcium and magnesium, can leave behind mineral deposits that cling to the scalp and hair strands. This buildup blocks moisture from entering the hair shaft, making it brittle, dull, and prone to breakage and frizz. A study published in the International Journal of Trichology found that hair exposed to hard water (with higher levels of calcium and magnesium) had reduced tensile strength compared with deionised water. Over time, hard water can also make your scalp feel itchy and cause colour-treated hair to fade faster. But with the right care, including clarifying tre

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