Biotin, also known as Vitamin B7 or H, is a B vitamin found in small amounts in several foods, such as eggs and nuts. It helps in nourishing thinning hair and helps promote hair growth. Biotin helps you maintain healthy looking hair, helping to prevent them from looking brittle and dull. Taking Biotin with other proven nutrients for healthy hair growth helps promote healthier looking and thicker hair in line with your natural hair growth cycle. St Botanica Biotin & Collagen Volumising Shampoo increase fullness and thicken hair. Hydrolysed Collagen Fights off free radicals that can affect your hair texture, growth, and thickness. Moroccan Argan Hair Conditioner. This rejuvenating conditioner absorbs into the hair follicles, repairing and protecting it from styling heat and the suns UV rays.