What is the ideal water temperature when shampooing hair?

Lukewarm water is the ideal temperature for shampooing hair because it balances comfort and effectiveness. This temperature helps to effectively dissolve excess oils and product buildup on the scalp and hair without causing irritation or damage. Lukewarm water is warm enough to open up the hair cuticles gently, allowing for better penetration of the shampoo and any subsequent conditioners or treatments. This results in a more thorough cleansing while also protecting the hair structure from the potential drying effects of hotter temperatures.

Cold water, while refreshing and potentially beneficial for closing cuticles at the end of a wash, is typically not effective in properly cleansing the scalp and hair as it may not dissolve products and oils effectively. Hot water, although it may feel pleasant, can strip the hair of its natural oils and moisture, leading to dryness and potential damage. Room temperature water, while comfortable, may not provide the same level of cleansing efficiency as lukewarm water. Thus, lukewarm water strikes the perfect balance for achieving clean and healthy hair during the shampooing process.