Biotin encourages hair and scalp condition. Dietary sources of biotin include: nuts, brown rice, and oatmeal. Iron is also essential for Hair Growth and are offered in blackstrap molasses, green leafy vegetables, leeks, cashews, dried fruits, figs, and all types of berries. To help your body absorb iron, you'll need vitamin C, which you can obtain from citrus fruits, strawberries, and red peppers.