Which of the following is NOT a benefit of using professional haircolor products?

Using professional haircolor products generally offers several benefits, with effectiveness in achieving desired results, customization for various hair types, and a wider range of shades being significant advantages. The assertion that they cause damage to hair is inaccurate in the context of professional products because these formulations are designed to be less damaging than many over-the-counter alternatives.

Professional haircolors often contain conditioning agents that help maintain the hair's health during the coloring process. They are formulated with a focus on minimizing damage, providing better results while preserving the integrity of the hair. Therefore, the notion that these products cause damage contradicts the intended purpose and advancements in professional formulations.