Man is called as mammal because he has mammary glands and hair all over the body. Hair is the by-product of asthi dhatu or bones. The development of bones depends on the proper absorption of calcium and magnesium. Hence if your hair is not healthy, then it is an indication that these elements are not properly absorbed in your body.
Proper nourishing diet is a must for healthy hair. Dairy products like cheese, milk, yogurt as well as coconut, apples and cabbage should be consumed.
Average number of scalp hair alone is about 100,000. They grow at the rate of 0.35 mm daily, which means about 100 feet of hair are produced every day.