Protein conditioners are designed to:

Protein conditioners are formulated to strengthen and repair the hair by delivering proteins that can help rebuild and fortify damaged strands. These conditioners are typically left on the hair for an extended period, allowing the proteins to penetrate the hair shaft and adhere more effectively, leading to enhanced repair of the hair's structure.

By allowing protein conditioners to stay on longer, you enable deeper absorption of the beneficial ingredients, which play a critical role in restoring elasticity, reducing breakage, and improving overall hair health. It’s important to apply them as directed and avoid overuse, as they could lead to protein overload if used excessively, which may lead to hair becoming stiff or brittle.

The other options do not align with the primary purpose of protein conditioners. Daily use and quick wash-out is more typical of moisturizing conditioners, and temporary color application is not a feature of protein conditioners. Additionally, the reaction with water to create foam pertains to cleansing shampoos rather than protein treatments.