Since hair is protein, a diet that is too low in protein may cause some thinning in hair or a retardation in the growth cycle. The converse is true, If you eat a protein-rich diet it will often result in improved hair growth.
Some nutritional experts suggest the dietary utilization of calves liver, brewer's yeast, wheat germ and a daily dose of two tablespoons of granulated lecithin to maximize hair growth, strength and beauty.
Other good food sources for protein include fish, eggs, beans and yogurt. Soy protein has also been found to be helpful in stimulating hair growth.
One study of the results of soy on the hair found that it not only strengthened the hair but caused it to grow. A great source of soy is tofu.
Growth Blockers
Excessive stress and some medications are conclusively known to retard hair growth. If you have a medical condition and your physician has prescribed medications it is imperative that you follow your doctor's orders regardless of the impact to your hair,
Warning: Always consult your doctor BEFORE you undertake any new type of vitamin, mineral program or herbal program of any type to make sure it does not interfere with any medical treatment you may currently be on.
However, if you are under severe stress it is helpful to reduce the stress as much as possible. Consider meditation or relaxation as a way to cut back on any major stress in your life. Your hair will love your for it.
Another secret hair helper is rest and sleep. It has been discovered that to grow faster, hair needs an adequate amount of sleep (7-9 hours are suggested).