What is the intended effect of protein (conditioning) shampoos?

Protein (conditioning) shampoos are specifically formulated to strengthen and improve the overall health of the hair by providing essential proteins that may be lacking due to damage or environmental factors. These shampoos work by penetrating the hair shaft and temporarily filling in the gaps in the hair structure caused by wear and tear, which leads to improved elasticity and resilience.

In addition to their strengthening properties, these shampoos often contain moisturizing agents that help to retain moisture in the hair. By combining conditioning and moisture-binding ingredients, the intended effect is to leave the hair feeling softer, more manageable, and hydrated, which is particularly beneficial for natural hair that may be prone to dryness and breakage.

The other options suggest effects that are typically contrary to the benefits of protein conditioning shampoos. Stripping natural oils can lead to dryness, while creating volume or providing astringent qualities does not align with the primary goal of reinforcing and moisturizing the hair.