Vitamins for Hair Growth and Thickness Healthy hair starts from within, and vitamins play a critical role in promoting growth, strength, and thickness. Deficiencies can lead to hair thinning, breakage, and slow growth. Here are five essential vitamins that your hair needs to thrive: Vitamin A Vitamin A helps the scalp produce sebum, a natural oil that keeps hair moisturized and prevents dryness and breakage. It also supports cell growth, which is crucial for healthy hair follicles. However, too much vitamin A can lead to hair loss, so balance is key. Vitamin B7 (Biotin) Biotin is well-known for its role in strengthening hair and nails. It improves keratin production, the protein that forms the structure of hair strands, making hair thicker and less prone to breakage. Biotin deficiency can cause thinning and brittle hair. Vitamin C Vitamin C is a powerful antioxidant that protects hair follicles from damage caused by free radicals. It also aids in the production of collagen , a str...