What effect does hard water have on hair?

Hard water contains high levels of minerals, particularly calcium and magnesium, which can have a significant impact on hair care. When exposed to hard water, hair can accumulate these minerals over time, leading to buildup. This buildup can create a barrier on the hair shaft, preventing moisture from penetrating and making it difficult for hair products to work effectively. As a result, hair often appears dull, lacks luster, and can feel rough or brittle.

The presence of these minerals also affects how well shampoos and conditioners can cleanse and moisturize the hair, potentially leading to further dullness and lack of shine. Thus, the correct option accurately reflects the negative impact of hard water on the hair's appearance and overall health.