California Cosmetology Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

Biotin, also known as vitamin B7, plays a crucial role in promoting healthy hair growth. It is specifically involved in the synthesis of keratin, which is a key protein that makes up the structure of hair. Adequate biotin intake is associated with increased hair thickness and overall hair health. Deficiencies in biotin can lead to hair loss and other hair-related issues, which underscores its importance in maintaining healthy hair.

While the other vitamins mentioned also contribute to hair and skin health, biotin is particularly recognized for its direct effects on hair growth and strength. For instance, vitamin A supports the production of sebum, which keeps hair moisturized, and vitamin C helps in collagen production, an important protein for hair structure. Vitamin D is linked to hair follicle health, but biotin is specifically highlighted as essential for hair growth and preventing hair loss. Thus, the choice of biotin over the other vitamins reflects its unique and critical role in hair health.