Hard water leads to dandruff by leaving mineral deposits on the scalp, causing it to dry out.
How Hard Water Causes Dandruff
When hard water is used with soap, the calcium and magnesium minerals bind to the soap’s surfactants (the ingredients that allow the soap to effectively clean), preventing these lathering agents from working properly.
Your Water Hardness Your Showering Frequency Your Skin Sensitivity The Hair Products You Use
Use A Deep Moisturizing Conditioner Or Hair Mask While a hair mask or conditioner won’t prevent hard water deposits, it’ll help support healthy hair and reduce issues with dead skin cells, itchiness, and irritation of the scalp.
A clarifying shampoo is a step up from the usual shampoo formula. It has more intense cleaning properties and is more capable of stripping dirt, oils, and unwanted debris (including hardness minerals) from the hair and scalp.