What are common ingredients in a hair filler product?

Hair filler products are designed to enhance the health and appearance of hair by improving its texture and manageability. The correct answer focuses on the ingredients that directly contribute to the efficacy of these products.

Protein-based ingredients, including keratin, are often key components in hair fillers because they help to rebuild and strengthen the hair shaft. Keratin is a fibrous protein that naturally occurs in hair, skin, and nails, and it plays a crucial role in maintaining hair structure. By incorporating these protein-based ingredients, the filler can fill in gaps and weak areas in the hair, leading to improved elasticity, decreased breakage, and a healthier overall appearance.

Moisturizing agents in hair fillers, such as various natural oils or humectants, also assist in hydrating the hair, making it more pliable and reducing frizz. This combination of strengthening proteins and moisturizing components is what makes option B the best choice for identifying common ingredients in hair filler products.

In contrast, the other options include ingredients that, while they may be found in cosmetic products or hair care items, do not directly contribute to the filling and strengthening effect that is characteristic of hair fillers. For instance, water and alcohol are often used as solvents or carriers but do not inherently provide