Which factor can affect the effectiveness of a hair product?

The effectiveness of a hair product is significantly influenced by the hair type of the client. Hair types can vary greatly in terms of texture, porosity, density, and health, which means a product that works well for one individual may not yield the same results for another. For example, a moisturizing product may provide excellent hydration for dry, coarse hair but may make fine, oily hair feel weighed down. Understanding the specific needs and characteristics of a client's hair type helps in selecting the most suitable products, ensuring optimal results and client satisfaction. This personalized approach is essential for achieving the desired look and maintaining hair health.