How fast does hair grow back? It is hard to estimate how fast your hair grows, because on average, human hair only grows about half an inch per month. That being said, it is not uncommon for new hair to grow several inches in a short month or even as small as a centimeter. The average person will probably be happy with about one or two inches of new hair in a week. Hair growth slows down as you age, so you will probably not see very much more growth after about age thirty.
Your diet can have a big influence on how fast hair grows. Certain foods promote faster hair growth. Fast growing hair can be promoted by drinking plenty of water and using products like shampoo that contains natural oils. Foods rich in vitamins A, C, and E are also known to stimulate hair growth. These include such foods as fish, eggs, carrots, spinach, walnuts, and soybeans.
Veliky said that a shampoo that contains biotin can prevent hair loss and stimulate hair growth. According to him, biotin can improve air quality by improving the condition of the hair shaft. A shampoo that contains amino acids, like lysine, can also promote better air quality and speed up hair growth.