HomeGood nutrition is vital to healthy hair growth, just as it’s essential to overall good health. Although your body needs a variety of vitamins and minerals to maintain proper body functions, there are several that are specific to hair growth and health. When starting a new vitamin regime, it usually takes from 2 to 3 months to see results in your hair’s condition. That means that patience and consistency is very important. It’s also important to check with your doctor before starting a vitamin program, especially if you have health concerns.