Biotin

• Biotin, a derivative of vitamin B, is known as the "hair and nails" supplement. Biotin is naturally produced in the body, and strengthens hair and encourages cell turnover. It delivers extra protein to the hair shaft; since hair is composed primarily of protein, this builds up the hair shaft, making it more resilient. People taking biotin often report rapid growth, less breakage, and smoother hair.
  
  Adding extra biotin to the diet via supplements is one way to speed up the hair growth process. The most effective way to take biotin is orally. Biotin supplements can be found in the vitamin section of any natural foods store.
  
  When taking biotin, you may notice longer hair in other areas of the body, such as eyebrows. It also strengthens nails, helping them grow faster.
  
  

Silica

• Adding extra silica to your diet is also known to help hair grow faster. Silica is naturally found in the body; its primary duty is strengthening connective tissue (found in hair and nails). Silica supplements support this process by causing the hair shaft to plump up (resulting in thicker-looking hair) and polishing the cuticle, resulting in smoother hair. It also has the same effect as biotin on nails.
  
  Foods rich in silica, such as oats, can also aid in faster hair growth.
  
  

Eat a Balanced Diet

• Sticking to a well-balanced diet is a way to achieve longer hair without taking additional supplements. A diet rich in protein is vital to long, strong hair; since hair is a protein, reinforcing it with more protein makes it healthier. Sources of lean protein are egg whites (or whole eggs), beans, fish, chicken, and yogurt. Soy protein, found in soybeans (edamame) and tofu, works in the same manner as standard protein, and these are also attributed to increased hair growth.
  
  If you have questions about how to maximize the foods you eat to grow longer hair, talk to your doctor or a nutritionist. They can help craft a meal plan right for you.